Replica ice sculptures of Notre Dame Cathedral and London's Tower Bridge at the Ice Lantern Festival, Harbin, Heilongjiang Province, Northeast China, China, Asia

The Ponts-couverts (Covered-bridges) dating from the 14th century and two defensive towers over River Ill, overlooking the Petite France quarter, part of the Grande Ile, UNESCO World Heritage Site, Strasbourg, Alsace, France, Europe

Romanesque and Gothic Malostranske bridge towers, with the two towers of Baroque St. Nicholas church beyond, at night, Mala Strana, Prague, Czech Republic, Europe

Two young women looking at map, with Big Ben in background, London, England, United Kingdom, Europe

The Ponts-couverts (Covered-bridges) dating from the 14th century, and two of the three defensive towers over river Ill, part of the Grande Ile, UNESCO World Heritage Site, Strasbourg, Alsace, France, Europe

Tower Bridge in London, England, on a sunny day. The bridge's two towers, walkways, and suspension structure are clearly visible, along with some surrounding buildings and a river.

View of Two Towers Bridge from the Fairyland Trail in Bryce Canyon National Park, Utah, United States of America, North America

Galata Bridge over the Golden Horn, two-storied road bridge, traffic above, bars and restaurants below, Istanbul, Turkey

Detail, medieval bridge gate with commemorative plaque for the French attack in 1799, baroque towers 1788, Obere Neckarstrasse 2, Heidelberg, Baden-Wuerttemberg, Germany, Europe

Highlight Towers, Munich, Upper Bavaria, Bavaria, Germany, Europe

Executioner's home with half-timbered building, bridge building with two arches, small fortified tower and high water tower, Pegnitz river, trees, reflection, old town, Nuremberg, Middle Franconia, Franconia, Bavaria, Germany, Europe

Executioner's home with half-timbered building, bridge building with two arches, small fortified tower and high water tower, Pegnitz river, trees, reflection, old town, Nuremberg, Middle Franconia, Franconia, Bavaria, Germany, Europe

Ile de la cite, Seine, cathedral Notre-Dame, Paris, Ile-de-France, France

Alte Bruecke, 'Old Bridge', Karl-Theodor-Bruecke, over Neckar River, bridge gate with two baroque towers on the periphery of the old city, Heidelberg, Neckar Valley, Baden-Wuerttemberg, Germany, Europe

Alte Bruecke Bridge, Karl-Theodor Bridge crossing the Neckar River, Brueckentor Gate with two baroque towers at the edge of the historic center of Heidelberg, Neckar Valley, Baden-Wuerttemberg, Germany, Europe

Alte Bruecke, 'Old Bridge', Karl-Theodor-Bruecke, over Neckar River, bridge gate with two baroque towers on the periphery of the old city, Heidelberg, Neckar Valley, Baden-Wuerttemberg, Germany, Europe