High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

The legendary building that needed ghostly approval before being built.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A 140-year-old castle with underground caves hidden in San Francisco.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

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

These fantastically named natural pools look like something out of a Scottish myth.

Dramatic river bend surrounds a natural red-rocked pedestal.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

On Japan's Tashirojima Island, cats are king.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An emerald-green grotto just a short trip from Austin.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

An eerie, derelict amusement park in Berlin.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.