Ochtinská Aragonite Cave (Slovak: Ochtinská aragonitová jaskyňa, Hungarian: Martonházi-aragonitbarlang[citation needed]) is a unique aragonite cave situated in southern Slovakia, near Rožňava.

[2] Along with other caves of the Slovak Karst, it is included in the UNESCO World Heritage list as a component of Caves of Aggtelek Karst and Slovak Karst site, because of its diversity of aragonite formations and testimony to the cave-forming geologic processes.

The cave is located at 642 meters above sea level, with an temperature between 7.2 and 7.8°C.

[5] This stable microclimate, along with dissolved iron, manganese, and magnesium ion is the slowly dripping water, allows for the formation of the ornate aragonite formations.

The cave was discovered by Martin Cangár and Jiri Prosek in 1954 and opened to the public in 1972.