16. Dense public housing in Singapore
The sheer density of Singapore’s buildings warrants its spot on this list.
17. Gibbon Treehouse
This treehouse in Laos sleeps up to 8 people, and somehow has sufficient enough plumbing for a kitchen, a bathroom, and a shower. The Gibbon Experience runs these guesthouses, all of which are connected to one another with zip lines, and all profits are reinvested into conservation projects within the reserve.
18. Markthalle Altenrhein
This nature-inspired fairytale castle is actually an event center and museum in the tiny town of Staad, Switzerland.
19. Lyons Airport Train Station
Lack of public transportation to nearby Lyons makes this beautiful train station difficult to use for anyone who isn’t hopping a TGV train to the Alps, but it’s directly attached to the airport, making it the first impression many tourists get of southern France.
20. Brasilia
Master architect Oscar Niemeyer (December 15, 1907 – December 5, 2012) was among the most influential designers of all time. When Brazil decided to build its new capital city Brasilia in a spacious inland area, he had the rare opportunity to design and build an entire interlinked downtown which included the congress, supreme court, and cathedral.