Ondrášovy díry, Natural monument in Malenovice, Czech Republic

Ondrášovy díry is a pseudokarst cave system of fissure passages and domes on the Lukšinec ridge at 840–940 m, about 1.5–2 km northwest of Lysá hora. Its passages reach depths of over thirty metres and total roughly 250 metres, including an ice cave where snow and ice persist in summer.

The protection covers an underground system of pseudokarst fissure and crevice caves and their ecological functions. The site documents the development of sandstone flysch formations and hosts colonies of endangered bat species. It lies within the Beskydy European Significant Site and Bird Area.

Local legends link the caves on the Lukšinec ridge to the outlaw Ondráš, who is said to have hidden his stolen treasures in the network of underground holes. The name Ondrášovy díry, "Ondráš's holes", comes from these tales.

The caves lie on the Lukšinec ridge at 840 to 940 metres, 1.5 to 2 km northwest of the Lysá hora summit, in the Malenovice and Staré Hamry II cadastral areas. The passages and domes drop more than thirty metres, and the ice cave keeps snow and ice through summer. Expect uneven ground and wear sturdy footwear.

The cave system shelters colonies of endangered bat species, which is why it is protected as a zoological locality. It also lies within the Beskydy European Significant Site and Bird Area, so the underground passages are tied to wider nature protection.