An ethereal glowing blue ocean cave in Croatia.

The abandoned Japanese amusement park once loomed as a dystopian Disneyland.

A giant chess set, minus the psychedelic drug trip.

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

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

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A simple Colonial home with a past haunted by death and madness.

Three bridges straddle a stream, one stacked upon the other.

Medicinal spa created with the discharge from a geothermal energy plant.

Enormous underground chamber built to detect 'ghost particles' of the universe.

A bizarre house filled with an astounding array of collections.

A natural gas leak provides a flickering flame beneath a waterfall.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

This experimental utopian "city of the future" in rural India may hold a dark secret.

The oldest continuously operating farm in New York State.

Shortest overhead power line in the world.

The remains of three Luftwaffe launch pads designed for manned anti-aircraft missiles.

An eerie, derelict amusement park in Berlin.

Self-sufficient greenhouse floating on the Hudson River.