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 .
Moncodeno
The most notable of these are the Alto Releccio, with a depth of , making it one of the deepest caves in Italy, as well as the "Icebox of Moncodeno", a cave, visited by Leonardo da Vinci that stays icy even in summer.