Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Possibly the oldest of Britain's ancient henges is also one of its most stark.

This brilliant display of whirling fireballs celebrates Hogmanay.

A curious cave church carved into the face of a cliff.

Carefully reconstructed after the Bosnian War, this 16th-century bridge stands as a symbol of the country's enduring multicultural heritage.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

A public work of art that also provides some relief from the summer heat.

A miniature train-ride through Slovenia's largest cave system.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Climb inside an iron crystal magnified 165 billion times its normal size.

Brussels' favorite peeing boy has a sister.

Meet the bronze beloved pet to a family of famous peeing statues.

A little sculpture with a large wardrobe.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

The remains of the concrete ship can be seen during low tide.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

These planks were originally installed to hold the dead.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

A steep and winding road in the Yorkshire Dales passes by these deep natural potholes.

Believed to be the smallest castle in Europe.