Fall through a crack in the seams of reality at this immersive art installation.

Museum devoted to the artificial language of Esperanto.

This little sun pays homage to a massive gate that once stood at this location.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

A castle built by an eccentric medieval enthusiast in suburban Ohio.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Illegal drag racing two stories beneath Chicago’s streets.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This shop for all your super spy needs hides an educational secret.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This downtown Dallas art installation is always on the lookout.

A serene temple with stunning stained glass hides in downtown Dallas.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This colorful statue welcomes visitors to a Barcelona park.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

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