Already in 1922, there was an article published in the Slovak Bulletin:
" ... as natural beauties are being destroyed without any protection of administrative authorities. Near Vyhne, not far away from Banská Štiavnica, there are world known geological formations, which were also protected by the former Hungarian government under the name " Kőtenger". Currently, some consortium from Svätý Kríž has been quarrying there for four months and a great part of these monumental formations has been destroyed, as stated by a geological expert and nothing has been done to prevent this barbarism ...".
Supposedly, this article also contributed to the fact that in 1923, the Stone Sea was proclaimed a protected area and in 1937, the town councils of Banská Štiavnica and Banská Belá adopted the resolution proclaiming The Stone Sea a nature reserve and decided: " ... to protect this unique natural phenomenon for future." The nature reserve was proclaimed in order to protect geomorphologic forms and several protected and rare animal species. In the volcanic part of the Carpathian Mountains, the Stone Sea near Vyhne is the largest in terms of its area. A massive complex of blocks represents the rock fall formed probably in the earthquake. Looking from above, one can clearly see rocks sorted by gravitation. While at the base of the slope there are the largest rocks concentrated, the size of rocks gets smaller upward. The Stone Sea is built by reddish to violet rhyolite created in volcanic activity in the late Tertiary (Neogene). In terms of zoology, the area is important for several protected and rare animal species especially reptiles, typical of which is Wall Lizard (Lacerta muralis), in adjacent forests there are forest species of singing birds and predators.