What makes the Wind Cave in South Dakota the most dangerous cave in the world is that it’s also one of the world’s biggest caves! This dense maze of a cave is also the world’s very ﬁrst cave to be made into a national park. It’s also the world’s densest cave, possessing the largest channel volume per cubic mile. Furthermore, it’s very, very windy due to the presence of very few entrances. People get lost here so frequently that the US National Park Service even has a special team of spelunkers that are ready to rescue lost explorers on the trot.