Interior of the Reichstag, Berlin, Germany, Europe

Water fountain in Upper Barrakka Gardens, Valletta, Malta, Mediterranean, Europe

ARoS Aarhus Kunstmuseum, designed by Danish architects Schmidt Hammer Lassen, topped with Your Rainbow Panorama, a circular skywalk with windows in the colors of the rainbow, by Olafur Eliasson, a Danish-Icelandic artist, Aarhus, Jutland, Denmark, Europe

Your Rainbow Panorama, a circular skywalk with windows in the colors of the rainbow, by Olafur Eliasson, Danish-Icelandic artist, on the top of ARoS Aarhus Kunstmuseum, designed by Danish architects Schmidt Hammer Lassen, Aarhus, Jutland, Denmark, Europe

The installation Your Rainbow Panorama, a circular skywalk with windows in the colors of the rainbow, by Olafur Eliasson, a Danish-Icelandic artist, on top of ARoS Aarhus Kunstmuseum, designed by Danish architects Schmidt Hammer Lassen, Aarhus, Jutland, Denmark, Europe

Interior of Museum of Islamic Art, Doha, Qatar, Middle East

Interior of Museum of Islamic Art, Doha, Qatar, Middle East

A circular walkway for the Long Logs Trail in Petrified Forest National Park, Arizona, United States of America, North America

Hakka Tulou round earth buildings, Chengqilou, UNESCO World Heritage Site, Fujian Province, China, Asia

Hakka Tulou round earth buildings, Chengqilou, UNESCO World Heritage Site, Fujian Province, China, Asia

Aerial view of housing in Maryland

Aerial view of housing in Maryland

Fortress of Suceava, 1375; Suceava, Suceava County, Romania

Fortress of Suceava, 1375; Suceava, Suceava County, Romania

Fortress of Suceava, 1375; Suceava, Suceava County, Romania

Cyclist riding bike on wet walkway with glowing green light at night in Manhattan; New York City, New York, United States of America

Ruins, Cistercian Monastery, founded in 1202; Carta, Sibiu County, Transylvania Region, Romania