The Haitón del Guarataro is a solutional cave system in the Sierra de San Luis in Falcón State, Venezuela, 2.5 kilometres (1.6 mi) south-east of Curimagua. It is the deepest limestone cave in Venezuela,[1] and the entrance is a tourist attraction within the Juan Crisóstomo Falcón National Park.[2] A large entrance shaft 12 metres (39 ft) in diameter leads via drops of 168 metres (551 ft), 55 metres (180 ft), and 19 metres (62 ft) to a stream passage which eventually chokes. It has a depth of 305 metres (1,001 ft), and a total passage length of 640 metres (2,100 ft). It was first explored and surveyed in April 1973 by members of the Venezuela '73 British Karst Research Expedition.[3] It is formed in Oligocenereefal limestone.[4]