Toh Ha cave system
Area: Tulum South
Length: 47,072 m
Maximum depth: 12.8 m
Exploration
2004-2006 - Kim Davidsson (primary explorer), Nadia Berni, David Sieff, Brian Kakuk, Alex Kampe, Thorsten Kampe, Robert Schmittner
Chan Hol, a silted-in collapse found in 2003 beside highway 307, was opened in May 2004 by Kim Davidsson, who cleared the sediment and began exploring; the huge upstream section and the Forza Line followed. By the end of 2006 it had 17,000 ft of line, one of the largest single-entrance systems in Quintana Roo. Dates as given on the map: 2004-05 - 2006.
2007-03 - David Sieff, Nadia Berni, Alex Kampe, Thorsten Kampe
Chan Hol connected to Sistema Toh Ha.
2009-03 - Kim Davidsson
Neighbouring Ba'ab Zooz connected into Chan Hol's Cherry line. Total mapped and surveyed 15,760 ft.
2016-02 - Nadia Berni, Kim Davidsson, David Sieff