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 .
Anou Boussouil
In 1950, it was explored to a depth of ; at that time it was known as the second-largest pit in the world. An expedition in 1980 found that the cave reaches a maximum depth of . It was briefly known as Africa's deepest cave before Anou Ifflis was explored to a depth of .