Boybuloq Cave
The cave is the deepest known cave in Asia having been explored to a depth of from the entrance. At the lowest discovered level a water-filled siphon blocks further exploration. It is thought that the cave has the potential to be the deepest known cave in the world, with a theorised depth of making it deeper than the Veryovkina Cave. The explored length of the cave is .
Lamprechtsofen
On August 19, 1998, a team led by Polish caver Andrzej Ciszewski discovered a connection between Lamprechtsofen and the PL-2 cave system, which established the height difference of the united cave system as . This new discovery made Lamprechtsofen the deepest-known cave in the world for less than three years, since Krubera was discovered in June 2001 to be deep.