Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

This small chapel is built of human bones and decorated with a golden skeleton.

Along the most northwestern point in Africa is an ancient cave surrounded by legends.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

Rare karst landscape eroded from a flat seabed.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

The world's largest wooden structure.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

The final resting place of the great navigator, or maybe his brother.

A Spanish town built into the cliffs.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Europe's largest community of crocodiles and alligators.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

The stones of this formerly witch-obsessed castle were used to build a church.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

Ruins of a German Castle on top of a towering stone pillar.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This 1,400-year-old abbey was once a powerhouse for music and intellectualism known across Normandy.