More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

Watch the newest land on the planet form before your eyes.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Hidden within the waterfront hills resides this dilapidated military stronghold.

Essence of hound's tongue and tincture of bloodroot are just the tip of the herbalist iceberg at this beautiful, impressively-stocked apothecary.

A museum dedicated to an elusive cryptid.

An institution that preserves the history of institutionalization.

A world of craftwork elegantly curated in a historic brick warehouse.

An abandoned 19th-century hospital now swirling in ghost stories.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

This historic steamboat is scuttled just a few hundred feet from where it was built over a hundred years ago.

A collection of colorful dinosaurs hidden in an actual rainforest.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

San Francisco Bay's ghost town.

It is locally loved and ridiculed for literally looking like poop.

One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

A Roman-inspired temple once controlled half of San Francisco's waters.

A Tibetan Temple and Buddhist organization just off the beaten path in Northern California.