Amatérská Cave, Cave system in Blansko District, Czech Republic.

Amatérská Cave is a massive cave system in the Blansko District with over 40 kilometers of underground passages and chambers beneath the surface. The system has several entrances and contains underground streams that flow through the rock chambers.

The Planivy Caving Club broke through to the active Bílá voda stream on 18 January 1969, discovering 1.5 km of passages named Amatérská jeskyně. On 29 August 1970 Milan Šlechta and Marko Zahradníček died in a sudden flood while mapping the New Amatérská Cave; a 1973 adit from Pustý žleb later gave safe access.

A charcoal drawing on a cave wall, a geometric pattern about 30 by 40 cm resembling a grill, was radiocarbon-dated to roughly 5,200 years ago. The motif matches decorations on pottery of the same period, and the cave is known for these archaeological finds.

The cave is closed to the public except for its entrance; occasional openings are the exception, not guided tours. The natural entry lies in the Cikánský závrt sinkhole, and an artificial adit was driven from the Pustý žleb canyon in 1973 to reach Nová Amatérská jeskyně. The lowest levels are permanently flooded and only passable with cave-diving techniques.

A charcoal drawing about 30 by 40 cm, resembling a grill, survives on a cave wall; radiocarbon dating of the charcoal gave roughly 5,200 years, and the pattern matches decoration on pottery of that period.