Blue hour on the Borgo Teresiano, Trieste, Friuli Venezia Giulia, Italy, Europe

View of Douro River and Dom Luis I bridge, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of Dom Luis I bridge from colourful narrow street, Porto, Norte, Portugal, Europe

View of the Dom Luis I bridge over Douro River and terracota rooftops, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of the Dom Luis I bridge over Douro River and terracota rooftops, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of the Dom Luis I bridge over Douro River and Rabelo boats aligned with colourful buildings, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

Boston Skyline with Longfellow Bridge

Tower Bridge Daybreak

Tower Bridge at Dawn

Tower Bridge Approach

Charles Bridge and Church of Saint Francis of Assisi with Old Town Bridge Tower against sky, UNESCO World Heritage Site, Prague, Bohemia, Czech Republic (Czechia), Europe

Art nouveau buildings along Vltava River and boats at Slovansky island, Prague, Czech Republic (Czechia), Europe

Aerial of the Guggenheim Museum, Bilbao, Basque country, Spain, Europe

View of Argostoli and De Bosset Bridge, capital of Cephalonia, Kefalonia, Ionian Islands, Greek Islands, Greece, Europe

Garden, Nijo castle, Kyoto, Japan, Asia

View from Alexandre III bridge of Grand Palais and Petit Palais, Paris, France, Europe

Mississippi River, Memphis, Tennessee, United States of America (U.S.A.), North America

A colorful street in old town Perugia, Umbria, Italy, Europe

Aerial cityscape showing River Thames, Tower Bridge and railway tracks, London, England, United Kingdom, Europe

Golden Gate Bridge in the mist, San Francisco, California, United States of America, North America

Tower Bridge and the River Thames, London, England, United Kingdom, Europe

Tram on Szabadsag Bridge crossing the Danube, Budapest, Hungary, Europe

Bridges over the Vltava River including Charles Bridge, UNESCO World Heritage Site, and Old Town Bridge Tower at sunset, Prague, Bohemia, Czech Republic, Europe

Evening light, Charles Bridge, St. Vitus's Cathedral in the distance, seen from across the River Vltava, UNESCO World Heritage Site, Prague, Czech Republic, Europe

Bridge and Medieval Monastery, Brantome, Dordogne, France

Chicago, Illinois, United States of America, North America

Marina and Sandy Beach with Molsen Building, Montreal, Quebec, Canada, North America

Golden Gate Bridge at sunrise, San Francisco, California, United States of America, North America

Moustiers-Sainte-Marie at dusk, Alpes-de-Haute-Provence, Provence, France, Europe

Brooklyn Bridge, New York City, New York, United States of America, North America

Elevated view of the Charles Bridge, UNESCO World Heritage Site, Prague, Czech Republic, Europe

Old Town Bridge Tower from Charles Bridge, UNESCO World Heritage Site, Prague, Czech Republic, Europe

The Chain Bridge over the Danube River, Budapest, Hungary, Europe

An early morning view of Budapest including the Chain Bridge, Castle Hill and the Danube River; Hungary

Sydney Harbour Bridge, Sydney, New South Wales, Australia, Pacific

People walking across the Bow Bridge in Central Park after a snowstorm, New York City, New York State, United States of America

River Thames, Millennium Bridge and City of London skyline at dusk, London, England, United Kingdom, Europe

The Paro Tsong (a old castle) and a wooden covered bridge, Paro, Bhutan, Asia

Media Harbour (Medienhafen), Neuer Zollhof building designed by Frank Gehry and Rhineturm tower, Dusseldorf, North Rhine Westphalia, Germany, Europe

Ponte Vecchio, Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

The Shard and Tower Bridge stand tall above the River Thames, London, England, United Kingdom, Europe

View over the port and River Rance with the Pont Gothique, Dinan, Cotes d'Armor, Brittany, France, Europe

London, uk. Aspect of the millenium footbridge across the thames, with st. Paul s cathedral in the backgrond

Bridge over the River Rhone, near Aix-les-Bains, Savoie, Rhone-Alpes, France, Europe

Albert Bridge over the River Thames, Chelsea, London, England, United Kingdom, Europe

The Porta Magna, Arsenal, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Charles Bridge, UNESCO World Heritage Site, Prague, Czech Republic, Europe

Marina Bay, Helix Bridge and Marina Bay Sands Hotel, Singapore, Southeast Asia

Defocussed view of Brooklyn Bridge and Lower Manhattan skyline at night, New York City, New York, United States of America, North America

Kriebstein Castle, on the Zschopau River, Kriebstein, Saxony, Germany, Europe

Bridge St. Benezet over Rhone River at sunset, UNESCO World Heritage Site, Avignon, Vaucluse, Provence, Provence-Alpes-Cote d'Azur, France, Europe

View over Traben-Trabach and the Moselle River, Moselle Valley, Rhineland-Palatinate, Germany, Europe

Tower Bridge and River Thames at twilight, London, England, United Kingdom, Europe

Ponte Sant'Angelo with 16th century statues and the Castel Sant'Angelo at night, Rome, Lazio, Italy, Europe

View over Main River to the financial district skyline, Kaiserdom cathedral, Paulskirche church, Frankfurt, Hesse, Germany, Europe

Gateshead Millennium Bridge, Newcastle-upon-Tyne, Tyne and Wear, England, United Kingdom, Europe

Dusk lights on typical buildings and bridges reflected in a typical canal, Amsterdam, Holland (The Netherlands), Europe

Tower Bridge, London, England, United Kingdom, Europe

View of Franciscan Church and Triple Bridge at dusk, Ljubljana, Slovenia, Europe

View of Bixby Bridge on Big Sur Coastline, Highway 1, Pacific Coast Highway, Pacific Ocean, California, United States of America, North America

View of Golden Gate Bridge from Baker Beach at dusk, South Bay, San Francisco, California, United States of America, North America

View of Golden Gate Bridge from Golden Gate Bridge Vista Point at dusk, San Francisco, California, United States of America, North America

Cycling along the bank of the Kamo River in autumn, Kyoto, Japan, Asia

View over Neisse River to St. Peter and Paul Church at sunrise, Goerlitz, Saxony, Germany, Europe

Douro River and Cityscape of Porto, elevated view, Porto, Portugal, Europe

Group of tourists, Krka National Park, Dalmatia, Croatia, Europe

Aerial of Juutuanjoki River, Inari, Finland, Europe

Gate and Bridge to Parco della Cittadella, Parma, Emilia Romagna, Italy, Europe

View of Douro River and The Ribeira district from Dom Luis I bridge at sunset, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

Wooden bridge leading to Blatna Castle, Blatna, Czech Republic

Boston's Public Garden Lagoon Bridge

The circle shaped wooden bridge (Infinity Bridge) at dusk, Aarhus, Jutland region, Denmark, Europe

Illuminated arch of Charles Bridge at twilight, UNESCO World Heritage Site, Prague, Bohemia, Czech Republic (Czechia), Europe

Aerial of Vizcaya Bridge, UNESCO World Heritage Site, Bilbao, Basque country, Spain, Europe

Aerial view of the lake and beach of Sabaudia with the woody mountain of Circeo in the background at dusk, Sabaudia, Tyrrhenian Sea, Latina province, Latium (Lazio), Italy, Europe

View of Argostoli and De Bosset Bridge, capital of Cephalonia, Kefalonia, Ionian Islands, Greek Islands, Greece, Europe

View of Argostoli and De Bosset Bridge, capital of Cephalonia, Kefalonia, Ionian Islands, Greek Islands, Greece, Europe

View of Argostoli, capital of Cephalonia and De Bosset Bridge at dusk, Argostolion, Kefalonia, Ionian Islands, Greek Islands, Greece, Europe

Passenger and fishing boats in the harbour in Yangon (Rangoon), Myanmar (Burma), Asia

Mittlere Rheinbrucke Bridge and Martinskirche Church, Grossbasel, Basel, Canton Basel Stadt, Switzerland, Europe

Ponte Vecchio, famous bridge over the Arno River, Florence (Firenze), Tuscany, Italy, Europe

View over the River Vltava to Smetana Museum and Charles Bridge, Prague, Bohemia, Czech Republic, Europe

Castle San Angelo, Rome, Italy

Tree reflecting in Taung Tha Man Lake near U-Bein bridge at sunset, Amarapura, Mandalay, Myanmar (Burma), Asia

Early morning on Brooklyn Bridge, New York City, New York, United States of America, North America

Golden Gate Bridge, San Francisco, California, United States of America, North America

Brooklyn Bridge, New York City, New York, United States of America, North America

An early morning view of the Gapstow Bridge after a snowfall in Central Park, New York City, New York State, USA

The Bow Bridge and Central Park Lake after a snowstorm, New York City, New York State, United States of America, North America

Bridges across the Monongahela River at dawn, Pittsburgh, Pennsylvania, United States of America, North America

Golden Gate Bridge, San Francisco, California, United States of America, North America

City skyline at dusk, Pittsburgh, Pennsylvania, United States of America, North America

Old bridge leading to the town of Amarante, Portugal, Europe

Cologne cathedral, UNESCO World Heritage Site, and Hohenzollern bridge at dusk, Cologne, Germany, Europe

Rheinturm tower, Rheinkniebruecke bridge and Media Harbour (Medienhafen), Dusseldorf, North Rhine Westphalia, Germany, Europe

The Bridge of Sighs, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

View over the port and River Rance with the Pont Gothique, Dinan, Cotes d'Armor, Brittany, France, Europe

View of St. Angelo bridge over the River Tiber and Castle St. Angelo (Hadrian's Mausoleum), Rome, Lazio, Italy, Europe

Pont de Sidi Rached bridge, Constantine, Eastern Algeria, Algeria, North Africa, Africa

Venetian bridge in the Troodos mountains, Cyprus, Europe