This haunting location was featured in the final scene of a classic spaghetti western.

You can still walk across this beautiful medieval bridge in Andorra.

This UFO crash-landed on the outskirts of a French town in 2009.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

The world's largest boar is a huge steel titan found at a French rest stop.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

This water-powered cliffside railway is one of the steepest funiculars in the world.

A museum dedicated to the tragedy of Bloody Sunday.

A 550-square-meter micro-nation off the coast of Britain.

This ancient causeway can flood daily, leaving Mersea Island as a true island for hours at a time, and cutting its 7,000 residents off from the mainland.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

its a 480 Meter tunnel on a public bridal way which is currently unlit so take a torch even in the day

The longest and steepest staircase locks in the United Kingdom.

The oldest of the three remaining bridges in England with buildings on top of them.

The world's first military tank was designed in this English city amid the stalemate of WWI trench warfare.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

This centuries-old canal known as the Cuckoo Dyke has a staircase of locks suitable for a giant.

A preserved 18th century steel factory.

A World War I relic found in the middle of a modern residential area.

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

A repurposed railway tunnel with otherworldly acoustic characteristics.

The tallest freestanding structure in the United Kingdom.