Okrouhlík, Natural monument and protected area in Libeň, Czech Republic.

Okrouhlík is a 0.5814-hectare natural monument on a 275-metre hill between Bulovka and the Ďáblice housing estate in Prague 8. It protects Cenomanian Mesozoic sandstones and conglomerates of the Peruc-Korycany Formation on the southwest slope, with diagonally bedded surfaces, and fine-grained marlstones on the southeast edge. Oak dominates the wooded slope, which is bordered by a garden colony and a city park.

This site gained protected status in 1982 as conservation efforts began to safeguard its natural features. The designation marked the start of formal management aimed at preserving the geological and ecological elements of the location.

Okrouhlík was declared a natural monument by the National Committee of the Capital City of Prague on 27 May 1982, under decree No. 3/1982, effective from 1 September 1982. A marked hiking trail, route 1105, runs through the protected area from the tram terminus in Kobylisy to Staré Malešice.

The site is accessible from several entry points, with information available through local municipal resources. Visitors should wear sturdy footwear since the sandy and rocky slopes can be slippery, especially during wet conditions.

The sandstone exposures show diagonal bedding that geologists use to reconstruct the direction of ancient water currents. The site also shelters 437 butterfly species, including the second-degree indicator Epiblema tetragonana.