This medieval Italian town is a sheer (and beautiful) cliffside defense.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

Real bones which are said to have belonged to a Polish dragon.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

An indigenous take on European design creates a stunning visual overload.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

An ancient monastery, a locked room, and a mysterious book heist.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Ornate limestone building now filled with geologic specimens, and more.

Furniture tries to escape an abandoned building in San Francisco.

Jule Körner's house full of bizarre architectural details.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

Two small chapels housed inside an ancient tree.

Art museum based around the collections accumulated over 58 years by one eccentric thrift store owner.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Art Deco urban decay at this historical building.

One-layer pyramid in Indiana.

The largest earthwork effigy in the world.

Rural churches in the middle of nowhere with religious frescoes by famous artist.

One man's vision and a labor of love of many.