This metal monument marking the middle of Belgium represents three regions coming together to form one country.

Ancient man-made caves underneath small town Belgium.

What was once a bustling mining installation is now a bustling hub of contemporary art.

No shoes allowed on this trail, which is designed to be experienced barefoot.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

An industrial relic is now one of Europe's most staggering art spaces.

Located inside Hoge Veluwe National Park, this museum began as the private collection of a prominent female art collector.

An idyllic hotel that gave its name to a supposed shadow government.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.

This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

A unique World War II memorial commemorates where the American B-17 bomber Man-O-War crashed.

On the highest peak in the Harz Mountains, science and the occult faced off in a failed attempt to turn a goat into a boy.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.

This dazzling wooden church was constructed as part of an elaborate peace project after the Thirty Years' War.

This fairytale medieval church in Poland originally spent centuries in Norway.

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The site of one of the largest prison escapes of World War II.

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

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.