This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

A tunnel of hardened lava along Maui’s famous Road to Hana.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

A popular tourist cave with a dark past.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

Community owned and operated, this property is home to a diverse set of nudists.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

Home to Hollywood history and a very special salt crystal.

The fossilized remains of ancient California redwoods.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

An urban laboratory.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

This park contains a number of standing stones meant to heal and inspire.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This 150 foot seven-tiered cascading waterfall is one of the hidden gems of the White Mountains.

A humid oasis combines recreation with exploration in a unique underwater cavern.