This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Inside this old mill is a collection of images that will always remain frozen in time.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A shockingly detailed small scale recreation of the temples of Abu Simbel.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

An abandoned castle owned and ignored by Masons carries a cursed history.

This groundbreaking 16th-century map is known as "America's birth certificate."

360° views of the city plus five floors of optical illusions and hands-on science.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

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

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

One of the biggest Buddhist stupas in Europe, hidden from most locals.

Narrow-gauge railway with its own personal power grid.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

The world's most important buildings shrunk to a tiny size.

This one-time health resort was used by aristocrats around the world.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

A whimsical bridge adorned with decorative dragons.

A cemetery for Slovenian notables also serves as a popular recreation space.