Wihin the Liptov Region the Demänovská dolina Valley is the most attractive mountain area and it has been frequented also because of its underground beauty. Since the 19th century the Ice Cave has been open for public. Shortly after the discovery of the world-famous Cave of Liberty in 1921 Ján Volko-Starohorský, founder of the Museum of Slovak Karst in Liptovský Saint Nicholas, had been trying to ensure its comprehensive protection. Following the designation of a neighboring Jánska dolina Valley in 1928 the State Land Office in Prague designated a partial landscape and nature reserve Demänovská dolina Valley on the September 19, 1929. At present, the middle karst part of Demänovská dolina Valley with an area of 836.88 ha is the national nature reserve protected by the Law no. 543/2002 Coll. on nature and landscape protection under the Regulation of the Ministry of Culture of the SSR no. 2771/73-OP dated 24 April 1973. The National Park Nízke Tatry Mts. (Low Tatras) has been designated 1978.