Australian Lake set aglow by Noctiluca Scintillans.

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

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

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

An abandoned railroad tunnel is now filled with bioluminescent bugs.

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

The kitsch mansion of the former Romanian president Nicolae Ceaușescu features a golden bathroom.

This remote camping site offers incredible stargazing opportunities.

Edinburgh’s version of the Sistine Chapel is this former church, with an interior covered in paintings done by one woman over the course of nearly a decade.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.

Vermont's hills are alive with the sound of music at this historic hotel.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

Catch a ride through the Pennsylvania countryside on this historic narrow-gauge railroad.

This letter written by Queen Elizabeth II in 1986 won't be opened until 2085.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

A billionaire heiress' menagerie of animals were lovingly laid to rest on the grounds of her former estate.

According to legend, this tomb holds the secrets to time travel.

Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

A life-sized recreation of the megafauna that once roamed this region is a feature at the birthplace of American paleontology.

This restaurant features Native American foods from across the country.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

"Only the dead get off at Kymlinge."