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 .
Riesending cave
The Riesending cave () is a pit cave in Untersberg and the deepest and longest in Germany. It was discovered in 1996. In June 2014 it became well known because of a large effort to rescue a lead speleologist.