This museum showcases the art of ancient sword-making.

This copy of the famous Prague Astronomical Clock is the result of one man's passion project.

A series of waterfalls create the illusion of perpetual rainfall in this hidden gorge.

Wander through the Corridor of Wonders in these stunning limestone caverns.

Watch cheese-flipping robots in action at this factory and museum.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

After 800 years, Europe's oldest elm tree has met its end.

A statue of a mischievous raccoon towers over this city park.

In a rural Japanese town that has committed to sustainable practices, even the hotel is made from recycled materials.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

An underground wonderland in Iowa.

Deep underground, the rusting remains of a German water pumping station from World War II.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

The remains of St. Lucius of Chur were said to be kept in this crypt for several centuries.

Deep in the limestone cliffs of the Alabaster Coast, a German fortress built during World War II.

Rubbing salt on this small stone dog is said to make wishes come true.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

The man who voiced Bugs Bunny, Daffy Duck, Porky Pig, and more has a headstone reading, "That's all, folks!"

This severely painted building has a twisted connection to the witch hunts of the 1640s.

Packed with geological formations, an ancient river, and taxidermied seals, this overlooked coastal cave system is worth a spelunk.

It's believed a castle existed at this site since the 12th century.

A stone burial chamber that was also the site of religious rituals.

With its vaulted ceiling and gilded details, this University of Washington library would feel right at home inside an old palace.

A bookstore with an entire room dedicated to damaged and forlorn comic books.