Cave filled with mildly poisonous gas and a lake full of rotten egg smelling acidic water that has a film of toilet paper like bacteria floating around on top of it gets cracked open by humans. They find it full of creepy crawly insects that haven&#x27;t seen the light of day since they were shut up inside it geologic ages ago. Then they used diving equipment to go into that pitch back lake and discover leeches as well.<p>I&#x27;d much rather visit any cave other than this one.