Urban explorers: Uncovering abandoned sex museums and decrepit amusement parks

By Kate Whitehead, for CNNUpdated 13th March 2014
A volcanic eruption bent, twisted and partly collapsed the Sankei Hospital in Hokkaido.
A volcanic eruption bent, twisted and partly collapsed the Sankei Hospital in Hokkaido.
Florian Seidel/Abandoned Kansai
Urban exploration can be risky. There's no way to tell if abandoned structures, like this coaster at Nara Dreamland, are architecturally sound.
Urban exploration can be risky. There's no way to tell if abandoned structures, like this coaster at Nara Dreamland, are architecturally sound.
Florian Seidel/Abandoned Kansai