Caves are usually known for the breathtaking views of stalagmites and stalactites that fill the cavernous passages with beautiful structures. This is not the case with the Ochtinska cave. 

This unique cave in Slovakia is filled with strange alien-looking aragonite mineral formations covering the ceilings and walls. One of only three known aragonite caves in the world, Ochtinska’s “Milky Way hall” attracts visitors who come to see the rare formations shine like stars.