The Gabernica Stream, which flows beneath the Orlica Hills, has its source in the Duplo Cavern, in the village of Pišece. The cavern cannot be entered, since this source present the water supply for the Bizeljsko Region. Visitors can check the water quality at the tap near the entry to the cavern. A water wheel is located a few metres from the cavern, symbolising the unceasing energy.
