The Sanzhi UFO Houses in New Taipei City, Taiwan, were pod-like structures built as part of a vacation resort. The resort never caught on, and the houses were demolished. (Image: Vision Times)

The Hole House in Houston, Texas, was an art project done to a building scheduled for demolition. The Hole House only stood for a few months. (Image: Vision Times)

The Ryugyong Hotel in Pyongyang, North Korea, is a 105-story, 1080 foot tall hotel that never opened for business. The project has been put on hold numerous times due to financial and structural issues. It has been called the tallest unfinished building in the world. (Image: Vision Times)

The National Library of Belarus in Minsk, Belarus, is one of the most unique looking libraries in the world. Besides looking cool and being huge, it sees thousands of visitors a day who seek library materials. (Image: Vision Times)

The Grand Lisboa in Macao, China, is just off the southern coast of Mainland China. It is a luxurious hotel and casino, full of top restaurants. (Image: Vision Times)

The Guggenheim Museum Bbilboa in Bilbao, Spain, is a modern art museum built along the coast of Spain. After completing construction in 1997, the museum’s popularity revitalized the region. (Image: Vision Times)

The Bahai Lotus Temple in New Delhi, India, resembles a lotus flower. Twenty-seven lotus petal-like structures surround it on all sides. (Image: WeChat)

The Container City in London, UK, is a structure of shipping containers outfitted as living and working studios. Since Container City was built, similar sites across London have been built. (Image: Vision Times)

House Attack in Vienna, Austria, was a collaboration between Austria’s biggest art museum, MUMOK (MUseum MOderner Kunst Foundation Ludwig Vienna), and artist Erwin Wurm. This outdoor exhibit has since been removed. (Image: Vision Times)

The Wooden Gangster House in Arkhangelsk, Russia, was possibly the world’s tallest wooden structure. It was built by a rich Russian gangster. The owner was unable to complete the house due to being sentenced to jail. (Image: Vision Times)

The Air Force Academy Cadet Chapel in Colorado Springs, Colorado, is a place where air force students of various faiths come to worship. The chapel is constructed of 17 steel spires. (Image: Vision Times)

The Solar Furnace in Odeillo, France, located high in the Pyrenees Mountains, is the largest solar furnace in the world. It employs 10,000 mirrors to generate 6300°F of heat. (Image: Vision Times)

The Dome House in Cape Romano, Florida, consists of a series of round bubble-shaped houses built in the early 1980s. A series of hurricanes and rising water levels are gradually submerging the structures. (Image: Vision Times)

Wall House 2 in Groningen, Netherlands, is a series of living structures intersected by a wall. After being conceived in the United States, the project was later realized in Europe. (Image: Vision Times)