Situated in the Bystra
-Valaska Karst of the Upper Hron River Valley, at the
southern border of Bystra village, on the southern
slopes of the Low Tatras. It was formed in Middle
Triassic limestones by ponor waters of Bystrianka
stream. It consists of the Old and the New Cave, about
1,000 m in length. Shapes of river modelling and
draperies, hanging locally from the edges of sinter
crusts created on the former river sediments which were
later floated by the river, are attractive for visitors.
Opening to the Old Cave was known to the locals since
the ancient times. Farther spaces were discovered in
1923. The precipice Peklo, through which the access to
the New Cave was found later, was discovered in 1926. A
part of the cave was open to the public in 1934 and
1940. The current 490 m of cave spaces have been made
public in 1968. It has been serving for
speleotherapeutic procedures since 1971.