The cave explored by Fortini and Vesely was one of the rare caves with running water inside. Vesely said that this indicated a cave that was usually more spectacular. They didn't see bats, which disappointed them, but they didn't find spiders either which was a relief. Vesely said that caving is one of those things a person either loves or hates immediately. Cavers who have a good sense of direction and are small definitely have an advantage.
Most caves tend to be warm and humid.