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 .
Callao Cave
Jackpot Cave in Sitio Tumallo, Bgy. Quibal also Peńablanca is allegedly the country’s second deepest cave with a surveyed depth of about and a surveyed length of . It has a walking passage, winding streams and various-sized pools, multi-depth shafts and drops for lots of rope works.