The park is situated at the location where the Ljubelj concentration camp (part of Mauthausen) once stood. The camp was built to house the prisoners who were charged with carving out a 1.5km long tunnel through the Karavanke mountain range. Although there was also a small contingent of civilian engineers and workers, the largest part of the workforce consisted of political prisoners and captured combatants, who were forced to work on the tunnel in deplorable and inhumane conditions. Between 1943 and 1945 the mostly Polish, French, Russian, Yugoslav and Norwegian prisoners worked without any respite on the strategically important tunnel.

Nowadays the site of the concentration camp, the only one on Slovene territory, is marked by an impressive sculpture. The monument is in the shape of a skeleton with a heart, raising its arms to the sky accompanied by the inscription on the pedestal: j'accuse (I accuse). Across the road the foundations of a large part of the camp still remain and information signs specify the exact layout of the complex and the function of the buildings. In the cellar of the nearby Koren restaurant is a memorial room with an exhibition consisting of the prisoners' personal belongings, the tools they used and photographs of the camp and its detainees. The whole site is a monumental place, and we recommend visiting this historically important location.