A list of circular buildings and structures, though some veer closer to ovals than perfect circles.
Aldar HQ – World’s First Circular Skycraper
The Sea-based X-band Radar docked onFord Island (Pearl Harbor)
Image CrediT Flickr User Rednuht
The Shell House by Japanese architecture firm Artechnic
The Stockholm Globe Arena, known as the Ericsson Globe
Image Credit Flickr User Anders Adermark
Dalian Shell Museum by The Design Institute of Civil Engineering & Architecture of DUT, China
Lbaragi Prefectual Museum of Modern Art, Japan
Dye 2, DEWLine radar in Greenland
Image Credit Flickr User Natural Life
The Sculptured House, Denver, CO
Hakka Tulou round earth buildings, Fujian province, China
National Theatre, Beijing, China
Vulcano Buono Shopping Center designed by Renzo Piano, Italy
Tietgen Dormitory by Lundgaard & Tranberg Arkitekter, in Copenhagen, Denmark
Volcano House, California
Colosseum, Rome, Italy
Check out the ALDar HQ in Abu Dhabi, the first circular skyscraper with a circular convex shaped facade.
Spectacular! Thanks just added to list.
many many more here – round houses: http://roundhouses.wordpress.com/
very nice Architecture