Velika Prepadna is a cave located on the beautiful Ajdovo Plateau. It opens on the northern slope of Srobotnik, on the border with the municipality of Žužemberk and the municipality of Straža. The entrance is marked by a wide sinkhole measuring 24 meters in depth, and then the rocky sinkhole continues with a narrow passage into the spacious Entrance Hall. In addition to the Entrance Hall, there are also Middle and Last Halls in the cave. Right in the Last is a mighty stalactite column. The cave is a habitat for underground animals, especially beetles, and a refuge for bats. It is 92 meters deep and 261 meters long.
The cave is a popular excursion spot, as evidenced by the beautifully landscaped surroundings. Entry into the cave is at your own risk, but it is recommended to be accompanied by experienced cavers.