Lom Rasová, Natural monument in Komňa, Czech Republic.

Lom Rasová is a protected natural monument in Komňa comprising a flooded sandstone quarry with habitats for amphibians and dragonflies. The site features water surfaces and gentle shorelines where rare species have found refuge.

Lom Rasová is a former sandstone quarry that exposed flysch layers of the Svodnice Formation, part of the White Carpathian Unit. It was later protected as a natural monument; the site lies in the first zone of the Bílé Karpaty Protected Landscape Area and is managed by the AOPK ČR regional office in charge of that landscape area.

The site shelters rare orchid species and bat populations that thrive in this former quarry landscape. Visitors can observe how nature has reclaimed the abandoned extraction area and created a thriving ecosystem.

The quarry lies 2.5 km southeast of Komňa, about 300 m east of the Komňa, Nový Dvůr bus stop at the crossroads by the Rasová motorest. Access is on foot; paths around the water and through the protected zone are uneven. Camping and open fires are not permitted.

The quarry pond is one of the highest sites in the Czech Republic where the very rare great silver water beetle (Hydrophilus piceus) lives. Researchers also recorded 37 ground beetle species and 31 water beetle species here, plus 19 dragonfly species.