Boybuloq Cave
Boybuloq Cave (also known as Boy Bulok) is a limestone cave in Uzbekistan and the deepest known cave in Asia. It is located high in the Gissar Range of mountains, near to Dehibolo, Uzbekistan's highest village. The cave and wider area is inaccessible for much of the year due to snow. Long-known to local people because of a nearby spring the cave was first explored by speleologists in 1984. Since then expeditions have mapped of passages in the cave and reached a total depth of . The cave could potentially extend much deeper and become the deepest in the world.
Xe Bang Fai River
Xe Bang Fai River Cave, also known as Khoun Xe Cave (Tham in Laotian is "Cave"), is an immense river cave located in a remote corner of Khammouane Province. It is believed to be one of the largest river cave in the world with enormous passages some 120 meters tall and 200 meters wide, and subterranean channel 7 km long.