12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

At this bohemian accommodation, guests who dream of joining the circus can spend the night in themed wagons.

This bizarre hotel on historic Route 66 has been plagued by rumors of paranormal activity.

This historic train station has been converted to a locomotive themed hotel.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

This historic motel standing at the "crossroads of America" offers a radio in every room and was saved by local protesters.

Kentucky's longest operating jail is now a spooky spot to spend the night.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

The abandoned medieval theme park was meant to be the "Disneyland of the Philippines."

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

A giant statue perched on dumpsters watches over the freeway.

The world's largest bioluminescent area was undiscovered by science until 2005.

Malaysian fireflies create a dazzling display as thousands light up in unison.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

These eerie outliers of the lightning bug family glow a mysterious blue color.

A glowing underwater cliff attracts marine life and divers in equal measure.

A galaxy of glowworms—larvae of a gnat—hides deep in the belly of these caves.

Once the path of a railway tunnel, now home to thousands of glowing insects.

Bioluminescent firefly squid light up this Japanese fishing port.

Australian Lake set aglow by Noctiluca Scintillans.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This supermarket offers shoppers a window into the past alongside their groceries.