A fantastic castle rumored to be the birthplace of King Arthur.

This remote castle was built to be a wealthy businessman's palace of vice but is now simply a historic vacation cottage.

The world's first and only escalator for lazy bicycles and their daunted riders.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This massive blockhead sculpture hides an entire library.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

A dangling church built over a Colombian gorge.

An exquisite tunnel of cascading flowers.

A gargantuan crystal kingdom.

The world's only museum devoted to the wonders of fluorescence.

Founded over a thousand years ago, this shrine is said to be built on the site of a warlord's harem prison.

Japanese island famous for poison gas and fluffy bunnies.

On Japan's Tashirojima Island, cats are king.

Mysterious wreckage of a small plane has been lodged in this tree since at least 1971.

This incredible Chinese theme park may be the largest bootleg in history.

Ancient rock-hewn town that witnessed key events of Georgian history.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

A historic freight system that found the true gold rush is in tourism.

A skeletal collection of former nautical mainstays.

A limestone wonderland of water and subterranean secrets.

Erosion and time have created a naturally-formed water park.

Moss and stone turn this waterfall into an otherworldly liquid veil.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.