Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Abandoned railway line circling the city of Paris.

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

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

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

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

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A snapshot of the city's fascinating voodoo culture.

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

Tucked in the back of this amazing antique store is an important piece of medical history.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

On Japan's Tashirojima Island, cats are king.

World's largest collection of serial killer artwork and other macabre exhibits.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

Decaying military base deactivated in the 70s is now visited by urban explorers and military enthusiasts.

Life's work of sculptor Elisabet Ney remains preserved in her last studio.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.