Gyokusendo Cave (Okinawa World) 玉泉洞
Five kilometres of cave, but only 890 metres can be walked: the rest stays dark.
The cave is the heart of the Okinawa World theme park, which has built around it a reconstructed Ryukyu-style village, eisā shows (a traditional drum dance) and an exhibition of habu snakes.
Okinawa
Gyokusendo Mae