Krnčí a Voleška, Natural monument in Libušín, Czech Republic

Krnčí and Voleška are two parallel valleys in Libušín connected by the Vlčinec plateau, sitting at elevations between 340 and 403 meters (1,115 and 1,322 feet). The protected area is managed as a working forest with specific conservation measures in place.

During World War II, the Gestapo operated a shooting range in the Krnčí valley where six Czech citizens were executed following the assassination of Reichsprotektor Heydrich. The location bears witness to the violence of the occupation period.

The valleys are now forested with ash trees, replacing the meadows that once hosted rare wetland plants. This natural shift reflects how the landscape has transformed over decades without active human management.

The two valleys lie on the northwestern edge of Kladno, between Libušín and Tuhaň, at 340–403 m above sea level; the plateau of Vlčinec connects them at about 390 m. The area is managed as an ordinary commercial forest, so expect no marked visitor infrastructure or maintained trails.

The protected area covers the southeastern tip of the Džbán highlands, in the Řevničovská pahorkatina subunit, between 340 and 403 m above sea level. Above the Krnčí valley stand the remains of a cottage belonging to MUDr. František Sladký, chief physician of the Kladno works hospital, who collaborated with the Nazis during World War II.