A karst cave which is protected as a natural monument. Bones of the cave bear have been found in it The cave is located on the right bank of the River Savinja, not far from the Pečovski bridge. It is 237 metres long and 30 metres deep. It boasts a rich fauna including an endemic bug called Orotrechus Lucensis, which is the reason why a net blocks the cave. Under the Trbiška Zijalka Cave, on the shore of the River Savinja, there are three other smaller caves from which karst springs emerge during periods of heavy rain.