Bozkovské dolomitové jeskyně National Nature Monument

The Bozkov Dolomite Caves NNM lies on the north-western edge of the village of Bozkov in the Liberecký kraj – Liberec Region. The protected area was declared in 1999 on an area of 5.24ha and lies at elevations of 425-485 metres above sea level.
The Bozkov Dolomite Caves are the most extensive karst system in north-eastern Bohemia. Unlike the other show-caves in the Czech Republic, the Bozkov Caves are formed in metamorphosed calcareous dolomite.
Alongside the classic decorative dripstone (sinter) forms, the caves are also enriched by quartz ledges and listels, which were prepared by selective corrosion and also by clumps of needle-shaped aragonite in places. The water surface in the lower-lying parts of the caves certainly form the largest underground lake in Bohemia.
The cave lies in a territory which is built of rocks of the Krkonoše-Jizerské hory Crystalinicum from the Silurian period. The dolomite, which is surrounded by non-karst rocks, emerges at the eastern part of the body as solid rock on the surface. By contrast the western part of the dolomite is deeply weathered and metamorphosed into a sandy eluvium up to 40 metres below the surface.
The landscape around the caves was originally covered by herb-rich beechwoods, with hornbeams and maples but most of this native forest has been replaced with stands of spruce, larch and birch. The most striking flowers are the contiguous carpets of spring snowflakes (Leucojum vernum) which decorate the forest floor. The presence of the large mouse-eared bat (Myotis myotis), brown long-eared bat (Plecotus auritis), barbastelle bat (Barbastella barbastellus) and lesser horseshoe bat (Rhinolophus hipposideros) has been recorded inside the caves.