A church of bones, decorated with 40,000 human skeletons.

An enormous and lavish Gothic church in Czechia.

This former quarry is now a picturesque gorge that hides a sunken lake.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

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

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

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.

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