Interior of the Reichstag, Berlin, Germany, Europe

Wide angle interior view of The Dome of the Reichstag building at night, designed by Sir Norman Foster, Berlin, Germany, Europe

Footbridge and skyscrapers at Songdo beach, Busan, South Korea, Asia

Tropical rainforest environment inside the Princess of Wales conservatory, Royal Botanic Gardens, UNESCO World Heritage Site, Kew, London, England, United Kingdom, Europe

Modern architecture, Clarion Hotel, Trondheim, Norway, Scandinavia, Europe

The Duty Free area at Dubai International Airport, Dubai, United Arab Emirates, Middle East

One of many aerial walkways connecting buildings in Central, Hong Kong Island, Hong Kong, China, Asia

Reichstag Dome, Berlin, Germany, Europe

Reichstag Dome, Berlin, Germany, Europe

Reichstag Dome, Berlin, Germany, Europe

Reichstag Dome, Berlin, Germany, Europe

Reichstag Dome, Berlin, Germany, 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

LUMA Cultural Center building, architect Frank Gehry, Arles, Bouches du Rhone, Provence-Alpes-Cote d'Azur, France, Europe

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

Modern high-rise buildings and a bridge in a city setting under a partly cloudy blue sky. Glass facades reflect the sky and clouds. Pedestrians are visible on a nearby walkway in Manchester, UK.

View of the BarenPark, the bear enclosure on the eastern edge of the old city, next to the Nydeggbrucke and Aare River, Bern, Switzerland, Europe

Philadelphia Magic Gardens, 1020 South Street, Philadelphia, Commonwealth of Pennsylvania, United States of America, North America

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

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

Man photographing mountains with smartphone from the Thrill Walk panoramic glass walkway, Murren Birg, Bern canton, Switzerland, Europe

Terrace of Ameron Hotel Speicherstad, HafenCity district, Hamburg, Germany, Europe

Canary Wharf, Docklands, London, England, United Kingdom, Europe

Marina Bay Sands Hotel, Singapore, Southeast Asia

Architect Frank Gehry's Guggenheim Museum futuristic architectural design interior at Bilbao, Basque country, Spain

Cloud Forest greenhouse in Gardens by the Bay, Singapore, Southeast Asia, Asia

The Dome by Norman Foster, Reichstag Parliament Building, Berlin, Germany, Europe

The Dome by Norman Foster, Reichstag Parliament Building, Berlin, Germany, Europe

The Dome by Norman Foster, Reichstag Parliament Building, Berlin, Germany, Europe

Aquarium, Barcelona, Catalonia, Spain, Europe

The Dome by Norman Foster, Reichstag Parliament Building at sunset, Mitte, Berlin, Germany, Europe

Cloud Forest greenhouse in Gardens by the Bay, Singapore, Southeast Asia, Asia

Bullring and Selfridges at dusk, Birmingham, West Midlands, England, United Kingdom, Europe

The Dome by Norman Foster, Reichstag Parliament Building at sunset, Mitte, Berlin, Germany, Europe

View point of The Observatory Of Pic Du Midi De Bigorre, Hautes Pyrenees, Midi Pyrenees, France. The 12m Ponton dans le ciel, a glass walkway high above the Pyrenees at Pic du Midi de Bigorre, a 2877m mountain in the French Pyrenees, home to an astronomical observatory and visitors centre. The observatory is acccessible from the village of La Mongie by cablecar. Tourists often visit in time for the spectacular sunset across the mountains.

View point of The Observatory Of Pic Du Midi De Bigorre, Hautes Pyrenees, Midi Pyrenees, France. The 12m Ponton dans le ciel, a glass walkway high above the Pyrenees at Pic du Midi de Bigorre, a 2877m mountain in the French Pyrenees, home to an astronomical observatory and visitors centre. The observatory is acccessible from the village of La Mongie by cablecar. Tourists often visit in time for the spectacular sunset across the mountains.

View point of The Observatory Of Pic Du Midi De Bigorre, Hautes Pyrenees, Midi Pyrenees, France. The 12m Ponton dans le ciel, a glass walkway high above the Pyrenees at Pic du Midi de Bigorre, a 2877m mountain in the French Pyrenees, home to an astronomical observatory and visitors centre. The observatory is acccessible from the village of La Mongie by cablecar. Tourists often visit in time for the spectacular sunset across the mountains.

View point of The Observatory Of Pic Du Midi De Bigorre, Hautes Pyrenees, Midi Pyrenees, France. The 12m Ponton dans le ciel, a glass walkway high above the Pyrenees at Pic du Midi de Bigorre, a 2877m mountain in the French Pyrenees, home to an astronomical observatory and visitors centre. The observatory is acccessible from the village of La Mongie by cablecar. Tourists often visit in time for the spectacular sunset across the mountains.

Berliner Dom, Neo-Baroque pulpit and a large Sauer organ, Berlin

Entrance of a footbridge covered with ivy, Savannah, Georgia, USA

Low angle view of buildings on the roadside, Romanesque, Downtown, Washington DC, USA

Reflection of a building on glass, Miami, Florida, USA

Tourists in front of buildings, California, USA

Buildings at a waterfront, Rowes Wharf, Boston Harbor, Boston, Massachusetts, USA

Group of people walking on a pedestrian walkway, Inner Harbor, Baltimore, Maryland, USA

Stoplight on the road, Miami, Florida, USA

Low angle view of a building, Miami, Florida, USA

Reflection of a building on glass, Miami, Florida, USA

Main Foyer of the Vancouver Public Library, British Columbia

Main Foyer of the Vancouver Public Library, British Columbia

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster, illuminated at night.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster, illuminated at night.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster, illuminated at night.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster.

Germany, Berlin, Mitte, Reichstag building with glass dome deisgned by Norman Foster.