A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.

A true Valhalla for cactus and succulent lovers.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

Strange secondhand shop showcasing taxidermy and oddies

A preserved building where the dead were once watched for signs of life.

A former plague hospital turned medical museum.

The remains of a medieval wall discovered in the basement of a jewelry store.

A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

One of the oldest masonic temples in the Netherlands, built in 1757.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

There's a strange stone hoodoo towering atop a wooded hillside and no one is quite sure how it got there.

This 15th-century fortification was built to defend bunnies.

This craggy boulder is fabled to be either a druidic relic or Satan's stumbling block.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

Final resting place of John Middleton "The Childe of Hale."

Perhaps the only prehistoric monument with its very own public bus stop.

An enigmatic natural rock formation with a manmade passage cut through the center.

The legend says that this English rock formation was once a hunter who was turned to stone by annoyed witches.