Ledena jama is a deep and long pit hidden in the hills above Moravice and Skrad, reachable by a poor hiking trail. It's translated name would be "Frost Cave" or "Icy Cave". There isn't much info on the web but supposedly it is beautiful in winter when large icicles form on it's walls and ceiling. I visited it in the end of summer. The cave is vast, the entrance is about 20 meters wide and 10 meters high, I roughly measured it's length to about 120 meters. Of course, it seems that numerous narrow canals diverge far deeper. It is very interesting to explore, just watch your step!