This large neolithic tomb, also known as Greengraves, is hidden off a Northern Irish road.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

The ritual has been performed uninterrupted for nearly 700 years.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

There's an exclusive Beefeaters pub hidden in the Tower of London.

Scotland's first Masonic lodge may also be the oldest in the world.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

Glasgow's oldest pub has a proud literary tradition and possibly a ghost or two.

Across the islands, baked goods, sauces, and much more are for sale 24/7.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

In this German city center, the streets have no names.

This single-track road rewards brave drivers with stunning Scottish scenery.

As part of an 800-year-old tradition, a man parades through town covered in a suit made out of spiky burrs.

This letter written by Queen Elizabeth II in 1986 won't be opened until 2085.

Hundreds of enormous icebergs drift through this waterway every year.

The second-highest train station in Europe.

What this Good Friday parade lacks in baroque filigree it makes up in somber gothic imagery.

This work of engineering is imbued with elegance and ingeniousness.

The gravestone of a famous poet features a fittingly poetic epitaph chosen by the writer himself.

Standing stones found on a construction site are re-erected.

The world's longest and deepest train tunnel.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.