It's not your typical library, memorial, or book store.

The resting place of 18th century German mummies.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

Goethe's "Faust" was inspired by these rock formations known as the "Devil's Pulpit" and "Witches' Altar."

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This massive subterranean fissure is known as the "underground Grand Canyon."

This impressive tunnel was dug entirely by hand over the course of 36 years.

The liveliest ghost town in the state.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

Grotto replete with mystical designs laid out in glued shell mosaics.

Museum about life, death, and cannibalism in the Stone Age.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

Stalactites and stalagmites in a beautifully lit cave.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

A rotting air force base is now home to rare birds and scarce plants.