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The volcanic rocks from the chalk era are wrinkled into calcite strata which is one of the unique curiosities of cave. They appear at many places in the cave corridors, where they capture the public’s attention with their brown-red or green colour. The volcanic rock contains agate crystals of a pink-white shade.
The bones of dead bats are found almost everywhere in the cave. This is another unique characteristic of the cave which gave rise to the cave’s name. Some of the bones are estimated to be 6000 years old. In the peripheral part of cave are also found remains of martens, bears and even goats.
The average temperature in the cave is + 3,5°C, however some glaciated parts only reach + 1°C. The open nature of the cave allows air flow of up to 5 m/s.
You can get to the cave from the southern side of Bystrá village by car or by bus from Brezno or Podbrezová to Trangoška or Srdiečko. It takes 1 hour from Trangoška via the mountain-path to the Chalet under Ďumbier (1740 m altitude). Another route goes from Srdiečko by chairlift either to the intermediate station at Kosodrevina or up to the final station at Chopok (2024 m altitude) and then by mountain path to M. R. Štefánik’s Chalet under Ďumbier. Another access route is from Liptov - by foot from Liptovský Ján or by use of the chairlift from Jasná to Chopok and then by path to the chalet.
Visit The Jaskyňa Mŕtvych Netopierov and become a caveman for a while. Equipped with speleological clothing and a helmet with miners light, you have the unique possibility to peep into mysterious underground of The Nízke Tatry. In this dark, humid and cold world which has a healing effect on the bronchial system, you will be taken back almost twenty million years in perhaps the oldest cave in Slovakia. Take advantage of this opportunity during your visit to The Nízke Tatry, Liptov or Horehronie areas.

Attention!
The cave is located in a mountain landscape in the NAPANT preserved park. Visitors are required to have good mountain footwear as well as good physical fitness. Due to environmental protection reasons, cave sight-seeing is limited only to pre-booked visitors up to a maximum number of 10 people

The Jaskyňa Mŕtvych Netopierov (The Dead Bats’ Cave) is located in the centre of Slovakia in the high mountain karst of Ďumbier (1750 m altitude), which is in the central part of The Nízke Tatry range. The relatively small, deep wrinkled limestone massif of The Kozie Chrbty which is 2 km in length and 300 m wide contains many corridors in 14 explored floors and two parallel branches. The largest subterranean chamber- The Bystrický dóm, which has a volume of 52 500m²,is located on the 7th floor at a depth of 180 m.