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Cliff view of Dead Wash Valley in Petrified Forest National Park, at sundown, Arizona, United States of America
Red hills of bentonite clay overlooking Dead Wash in Petrified Forest National Park, Arizona, United States of America
Paria View and hoodoos, Bryce Canyon National Park, Utah, United States of America
The Needles, incredible Canyon landscape, Canyonlands National Park, Utah, United States of America, North America
Jabal Ikmah Site, world's largest concentration of well-preserved Dadanitic inscriptions, 1st millennium BCE, AlUla, Medina Province, Saudi Arabia
Sandstone rock formations in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia
Sandstone rock formations in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia
Isolated tree among sandstone rock formation in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia
Isolated tree among sandstone rock formation in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia
Two people walking at the bottom of a canyon with sandstone walls in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Woman walking with headlamp at the bottom of canyon with sandstone walls in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Maraya Theatre, architect Studio Gio Forma, mirrored structure seeming to disappear in AlUla's Ashar Valley, AlUla, Medina Province, Saudi Arabia
Woman walking at the bottom of a canyon with sandstone walls in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Sandstone rock formations in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia
Distant view of layered mountain ranges of Sierra Nevda and Sierras de Tejeda, Almijara y Alhama align, with a prominent peak, Andalusia, Spain
Sossusvlei, Namib Desert, Namib Naukluft Park, Namibia, Africa
Corinth Canal connecting the Gulf of Corinth in the Ionian Sea with the Saronic Gulf in the Aegean Sea, Greece
Corinth Canal connecting the Gulf of Corinth in the Ionian Sea with the Saronic Gulf in the Aegean Sea, Greece
Meteora, ancient holy Monastery of Rousanos Saint Barbara, UNESCO, Kalabaka, Greece
Meteora, ancient holy Monastery of Varlaam, UNESCO, Kalabaka, Greece
Meteora, ancient holy Monastery of Rousanos Saint Barbara, UNESCO, Kalabaka, Greece
Meteora, ancient holy Monastery of Rousanos Saint Barbara, UNESCO, Kalabaka, Greece
Drone aerial view of Meteora with ancient holy Monastery of Varlaam and Great Meteoron, UNESCO, Kalabaka, Greece
Drone aerial view of Kriaritsi project area with abandoned roads in the south of Greece, Sithonia, Chalkidiki, Greece
Drone aerial view of Kriaritsi project area with abandoned roads in the south of Greece, Sithonia, Chalkidiki, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark geological structures, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece
Ancient theatre at the Asclepieion of Epidaurus, UNESCO, Peloponnese, Greece
The spectacular scenery on the island of Madeira, Atlantic Ocean, Portugal
The spectacular scenery on the island of Madeira, Atlantic Ocean, Portugal
Extraordinary sandstone rock structure called Dancing Rocks in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
View through the extraordinary sandstone rock structure called Dancing Rocks, Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
People meeting in front of magnificent sandstone rock structure, Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Sharaan Nature Reserve safari tour, AlUla, Medina Province, Saudi Arabia
Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Three women visiting Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Balamku Archaeological Site, Campeche State, Mexico
The south entrance of the historic Johnson Canyon Railroad Tunnel, Kaibab National Forest of Arizona, USA
Interior view of the Johnson Canyon Railroad Tunnel, Kaibab National Forest of Arizona, USA
Interior view of the Johnson Canyon Railroad Tunnel, Kaibab National Forest of Arizona, USA
A dilapidated bridge along the Johnson Canyon Railroad, Kaibab National Forest of Arizona, USA
A narrow and overgrown section of the abandoned Johnson Canyon Railroad in the Kaibab National Forest of Arizona, USA
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
View from below the rim of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
Super Panorama of the giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
The giant sinkhole known as Johnson Crater in the Kaibab National Forest near Ash Fork Arizona, USA
Forest Service Road 709 in the Kaibab National Forest of Arizona, USA
View from below the Stone Dam in the Kaibab National Forest, Arizona, USA
Top view of the Stone Dam in the Kaibab National Forest, USA
Top view from the Stone Dam in the Kaibab National Forest, Arizona, USA
View from the shore of Stone Dam Lake in the Kaibab National Forest, Arizona, USA
Historical information sign at Stone Dam Lake in the Kaibab National Forest, Arizona, USA
Overhead view of the Icy shore of Stone Dam Lake in the Kaibab National Forest, Arizona, USA
Man squatting beside extraordinary sandstone rock structure called Dancing Rocks, Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Large dry salt lake in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia
Mountainscape viewed from the top of Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
People at the Viewpoint on the Harrat volcanic plateau, AlUla, Medina Province, Saudi Arabia
Remarkable sandstone rock carved by erosion in the Ashar Valley, AlUla, Medina Province, Saudi Arabia
Remarkable sandstone rock carved by erosion in the Ashar Valley, AlUla, Medina Province, Saudi Arabia
Aerial view of the Rockies, United States of America
The Ossuary, Chichen Itza, Yucatan State, Mexico
Cenote Oxman, Valladolid, Yucatan State, Mexico
Cenote Samula, Dzitnup near Valladolid, Yucatan State, Mexico
Aerial view of the Site of Hegra (Madain Salih), UNESCO, in the area of AlUla, Medina Province, Saudi Arabia
Aerial of tombs carved in sandstone rock of Jabal Banat (Qasr al-Bint), Hegra (Madain Salih), UNESCO, AlUla area, Medina Province, Saudi Arabia
Entrance of the passage through the Siq channel at Jabal Ithlib area of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia
Passage through the Siq channel at Jabal Ithlib area within the Site of Hegra (Madain Salih), UNESCO, AlUla, Medina Province, Saudi Arabia
Woman in front of Face Rock, a sandstone rock formation in shape of human head profile, Hegra, UNESCO, AlUla, Medina Province, Saudi Arabia
Woman in front of Face Rock, a sandstone rock formation in shape of human head profile, Hegra, UNESCO, AlUla, Medina Province, Saudi Arabia
Jabal Alfil (Elephant Rock) by night, a natural red sandstone formation in the area of AlUla, Medina Province, Saudi Arabia
Aerial view from an aircraft of the desert in AlUla region, Medina Province, Saudi Arabia
Aerial view from an aircraft of the desert in AlUla region, Medina Province, Saudi Arabia
Angel's Landing, a 1500 ft high rock formation, Zion National Park, Utah, United States of America
Lindisfarne Castle, Holy Island, Northumberland, England
Hoodoos at Bryce Point, Bryce Canyon National Park, Utah, United States of America
View from La Ruleta viewpoint at sunset, Teide National Park, UNESCO, La Orotava, Tenerife, Canary Islands, Atlantic, Spain
Cullin Hills in winter, Isle of Skye, Scotland, UK
Cullin Hills in winter, Isle of Skye, Scotland, UK
Avola lakes, high angle view, Avola, Noto Valley, Sicily, Italy
Sally Lightfoot Crab (Red Rock Crab) in the Galapagos Islands, UNESCO, Eucador
Atlantic surf at Mosteiros, north west coast, Sao Miguel, Azores Islands, Atlantic, Portugal
Mosteiros and coast, Sao Miguel, Azores Islands, Atlantic, Portugal
Delicate Arch at golden hour, Arches National Park, Moab, Grand County, Utah, United States of America, North America
Twin Erratic boulders high above Nant Ffrancon valley, Snowdonia National Park (Eryri), North Wales, United Kingdom
Former Mine Working Slate Cavern Tunnel at Dinorwig Quarry (Dinorwic Quarry), Eryri (Snowdonia National Park), North Wales, United Kingdom
Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize
Matterhorn, Zermatt, Canton Valais, Switzerland
The Royal Complex at the Mesoamerican archaeological site of Lamanai (Submerged Crocodile), Belize
Rock formations in the oasis Tigui, Tibesti Mountains, Chad