Abismo Guy Collet
The Abismo Guy Collet (SP-090) is the deepest cave in South America, and the deepest in the world that is formed in quartzite. Located in a tepui in northern Brazil near the border with Venezuela, this cave was first explored by cavers in 2006 to a depth of 671 meters.
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.