The ruins of a military fortification sit atop this mountain.

After the owner of this Art Nouveau home died, it was turned into a museum displaying a lifetime dedicated to art.

A whimsical garden of outsider art in the Spanish countryside.

A 16th-century Andalusian palace.

The 14th-century ruins are said to contain healing powers.

This famed marionette theater and museum is bursting with imaginative string puppets.

A supersonic jet stands on a pedestal in this rural village as a monument to military aviation.

A quirky little wax museum is home to some of the most famous Serbians in history.

This feat of Brutalist architecture is also known as the Three Sisters.

This dazzling Art Nouveau mansion is now home to the Modern Art Gallery Subotica.

Serbia's master of striking memorials erected a forgotten, hidden gem in the hills outside a tiny village.

A beautiful 19th-century mansion slowly crumbled and became a 'ghost house' after World War II.

This fresco-covered medieval monastery hangs from the side of a steep cliff.

A pair of connected skyscrapers form this symbolic gateway.

This enormous steel tube is the biggest speaking horn in the world.

A tilted water tank turned tourist attraction.

Dedicated to the American general whose reply to a German demand for surrender was simply "Nuts!"

This annual Belgian water race attracts bathtub captains from all over the world.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

Cozy basement bar sports an inventory of over 2,000 beers.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

A Cold War watchtower atop a WWII-era bunker on a historic Dutch dike.

Enjoy a pint surrounded by Europe’s largest collection of vintage beer advertisements.

A seemingly out-of-place temple built on the spot where a mystic had a profound spiritual experience.