This bizarre hotel in Pyongang has been off-schedule for 24 years, and it's uncertain whether or not it'll ever be complete. Originally started in 1987 to overshadow the South Korean 1988 Olympics, work stopped in 1992 when the Soviet Union collapsed and didn't begin again until 2008. While striking and more or less complete on the outside, visitors to the hotel's interior say it still needs a great deal of work and is barely habitable as it is, taking the Guinness World Record as the largest unoccupied building on the planet. Great job, North Korea!
14. Pyramid - Spitsbergen Island, Norway
This Arctic ghost town sits on the Svalbard archipelago north of the landlocked Norwegian territories and west of Russia. The Russians actually owned and occupied the town from 1927, but abandoned the former Soviet outpost in 1998 after the collapse of the communist regime. Despite temperatures that drop to below -10 degrees Celsius, Pyramid is something of an odd tourist attraction for travellers who want to see a surprisingly well-preserved Soviet town. Several tour guides (and their pet arctic foxes) are the only inhabitants of the town, who live in abandoned hotels and try to maintain Pyramid.