This windmill has been grinding pigments for traditional paints for more than 200 years.

Colorful and chaotic stacked hotel in North Holland.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A long-buried ancient ruin unearthed right in the middle of the city.

An early 20th-century bullring converted into a modern shopping center.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Mountain where Jesus was first tempted by the Devil.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

Home to three historic ships from the age of Vikings.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

In this quiet park a rendition of a classic painting graces the outside of a charming restroom.

The park is home to the United States's only still-operating Dutch windmill.

An enormous roadside pan tells the story of a battle for pie glory.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

A hot dog stand where the heads are just as hot as the dogs.