Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

Covering 37 subterranean acres, this Armillaria gallic is a famous fungus with its own festival.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

People escaping slavery may have hidden inside a corpse vault.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

Shrine to Japanese water-goblins, complete with their preserved body parts.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

A taste of the macabre Tokyo's ritzy shopping district.

Fine dining in the bizarre world of Lewis Carroll.

A thriving artist's wonderland located just 6 kilometers from Korea's DMZ.

Various forms of phallic art decorate this hill in commemoration of legendary local tragedy.

A darkly erotic open-air statuary in Catalonia.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

A completely underwater art museum sends a stark message about humans' impact on the environment.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Commonly acknowledged as the only public monument to the Devil himself.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

Mysterious Spanish catacombs of unknown origins.

A landscape decorated with enormous skull sculptures.

A Spanish forest is filled with mysterious stone carvings.

A submerged archeological park still holds the wonders of a Roman Sodom.