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 .
Table Mountain (Butte County, California)
The largest cave is located at Phantom Falls, and the deepest cave is at Little Phantom Falls, and actually requires crawling. Both are located in Coal Canyon. A small cave is also located at Flag Falls and Beatson Falls.