Bela krajina does not have much surface water, so karst springs, water pits and ponds in this area were once extremely important for water supply. The first settlements always arose close to them.
Lebica is a water karst cave near the cemetery of the Holy Spirit in Semič. Stone stairs lead to the water. The carefully walled entrance and the arched interior of the water cave testify that Lebica was once a source of drinking water for the inhabitants of nearby villages.
Lebica was probably vaulted by the ancient Romans. Until the construction of the Bela krajina water supply system in 1898, Lebica was a very important source of water for the villagers, and they also supplied livestock here.
There is a constant current in the cave, it is 3m deep, 13m long, and a type of newt lives in it. This amphibian is highly endangered by the shrinking of the natural environment and is therefore included in the List of Endangered Animal Species in Slovenia.
This location offers a great view of Semiška gora mountain with the hills of Smuk and Semenič. It is also the starting point of the Karst Educational Trail from Lebica cave to the Krupa river, which takes about four hours of walking.