Partially submerged tilted Shiva temple below the ghats on the edge of the River Ganges (Ganga), Varanasi (Benares), Uttar Pradesh, India, Asia

Cold War sign at Check Point Charlie, Berlin, Germany, Europe

Check Point Charlie, Berlin, Germany, Europe

Nugget Point lighthouse on the coast and overcast sky, the Catlins, South Island, New Zealand, Pacific

Neist Point, Isle of Skye, Inner Hebrides, west coast, Scotland, United Kingdom, Europe

John Ford's Point and the Three Sisters and cowboy on horse, Monument Valley, border of Arizona and Utah, United States of America, North America

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Monument Valley with Navajo man posing on horseback at John Ford?s Point; Monument Valley Navajo Tribal Park on the Utah-Arizona border.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Congost de Mont-Rebei in the Pre-Pyrenees of Lleida, Catalonia. Serra del Montsec, La Noguera, Lleida, Spain The Montrebei Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lv©rida (Spain), between the regions of Ribagorza and Pallars JussvÜ. It is constituted in the narrowest part by which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Montsec mountain range, walls in vertical fall of more than 500 meters and a width at its minimum point of 20 meters . The Catalan part is part of the Noguera Nature Reserve. It is within the Sierra del Montsec Natural Interest Area.

Barbed wire along the border, Point Alpha, near Rasdorf, Rhoen, Hesse and Thuringia, Germany

Obelisk marking the border between Europe and Asia, performance of a Russian dance company, bread as a symbol of hospitality, Yekaterinburg, Jekaterinburg, Sverdlovsk, Ural mountains, Taiga forest, Russia

Obelisk marking the border between Europe and Asia, performance of a Russian dance company, bread as a symbol of hospitality, Yekaterinburg, Jekaterinburg, Sverdlovsk, Ural mountains, Taiga forest, Russia

Checkpoint Charlie, former border control point in Berlin, Germany, Europe

Border crossing between Jerusalem and Bethlehem, West Bank, Jerusalem side, Israel, Middle East

Jiayuguan fortress with two gatehouses at the western end of the Great Wall, Silk Road, Gansu, China, Asia

Memorial Guenter Litfin for the first person shot dead at the Berlin Wall, Kieler Strasse street at the Berlin-Spandau Schifffahrtskanal channel, Berlin, Germany, Europe

Memorial Guenter Litfin for the first person shot dead at the Berlin Wall, Kieler Strasse street at the Berlin-Spandau Schifffahrtskanal channel, Berlin, Germany, Europe

Laguna Verde and Licancabur volcano on the right, Bolivia near the border to Chile, South America

Women standing at the Laguna Verde and Licancabur volcano, Bolivia near the border to Chile, South America

Memorial Guenter Litfin for the first person shot dead at the Berlin Wall, Kieler Strasse street at the Berlin-Spandau Schifffahrtskanal channel, Berlin, Germany, Europe

Border sign of the Principality of Liechtenstein in Vaduz, Principality of Liechtenstein, Europe

Memorial Guenter Litfin for the first person shot dead at the Berlin Wall, Kieler Strasse street at the Berlin-Spandau Schifffahrtskanal channel, Berlin, Germany, Europe

German border sign in the port of Spiekeroog island, one of the East Frisian Islands in the North Sea, lettering "Passkontrolle", German for "passport control", announcing visa requirement, Lower Saxony, Germany, Europe

Advertising billboard with a large photo of a soldier wearing the uniform of the former Soviet army, Checkpoint Charlie, Berlin-Mitte, Germany, Europe

DDR border sign, Point Alpha Border Museum, Rasdorf/Geisa, Rhoen, Hesse/Thuringia, Germany, Europe

Memorial Guenter Litfin for the first person shot dead at the Berlin Wall, Kieler Strasse street at the Berlin-Spandau Schifffahrtskanal channel, Berlin, Germany, Europe

Checkpoint Charlie, Berlin, Germany, Europe

German border sign in the port of Spiekeroog island, one of the East Frisian Islands in the North Sea, lettering "Passkontrolle", German for "passport control", announcing visa requirement, Lower Saxony, Germany, Europe

The old Rhine River Bridge connects the German and the Swiss part of the city, Laufenburg, Baden-Wuerttemberg, Germany, Europe

A Border Collie dog poses and shows various tricks in a somewhat wintery setting. Little snow

Ischgl ski area boundary, Greitspitze Mountain, Samnaun, Switzerland, Tyrol, Austria, Europe

Weg der Hoffnung, work of art, memorial, food for thought, an art project of the Point Alpha Foundation, The Weg der Hoffnung with its 14 stations ties in with the Christian Way of the Cross, Point Alpha, memorial, commemorative and meeting place on the road between Geisa (Thuringia) and Rasdorf (Hesse), Germany, Europe

Footbridge with tourists at the Iguazu Falls at the border between Argentine and Brazil

A Border Collie dog poses and shows various tricks in a somewhat wintery setting. Little snow

Mauermuseum Berlin Wall Museum at Checkpoint Charlie, Berlin, Germany, Europe

Separation wall near Kalandia or Qalandiya checkpoint, Ramallah region, Palestine, West Bank, Western Asia

A US Border Patrol agent stands by the border fence that separates the United States and Mexico, Nogales, Arizona, USA

Former border checkpoint, Checkpoint Charlie, federal capital Berlin, Germany, Europe

Wall Museum, House at Checkpoint Charlie, Berlin, Germany, Europe

Point Alpha, memorial and meeting place on the road between Geisa (Thuringia) and Rasdorf (Hesse), Germany, Russian barrier on the demarcation line, Europe

Border sign, Free State of Bavaria, in Eng, Tyrol, Austria, Europe

Visitors on the Great Wall of China near Mutianyu in autumn, near Beijing, China, Asia

Young travellers, Laguna Verde, Bolivia near the border to Chile, South America

A Border Collie dog poses and shows various tricks in a somewhat wintery setting. Little snow

Jiayuguan fortress with gatehouse at the western end of the Great Wall, Silk Road, Gansu, China, Asia

Bridge across the Narva River, border between Estonia and Russia, Russian border control station, Narva, Estonia, Baltic States, Northern Europe

Panoramic view from the highest point on the plateau of Roraima table mountain, border triangle, Brazil, Venezuela, Guyana, South America

Laguna Verde and Licancabur volcano, Bolivia near the border to Chile, South America

US - Canadian border crossing sign, White Pass, south Klondike Highway, Alaska and British Columbia, B. C., Canada

Waterfalls, tourists on viewing platform, Iguacu, Brazil, South America

Bolivian - Chilean border station near San Pedro, Potosi, Bolivia, South America

Waterfalls, tourists on viewing platform, Iguacu, Brazil, South America

Carnial Alps, aerial view, near Koetschach Mauthen, view towards Italy, Carinthia, Austria, Europe

Border sign, border between Sweden and Finland, Karesuando, Norrbotten County, Sweden, Europe

Germany, Berlin, Checkpoint Charlie, US Army checkpoint and guardhouse reconstruction at the former crossing point between East and West Berlin.