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.
Riesending cave
The Riesending cave () is a pit cave in Untersberg and the deepest and longest in Germany. It was discovered in 1996. In June 2014 it became well known because of a large effort to rescue a lead speleologist.