The wild west is still alive and well at this authentic mining town watering hole.

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

This enchanting mountain plateau celebrates spooky local folklore.

This 135-year-old weather station studied the effects of the climate on human health.

This labyrinthine resting place of Black American leaders has been reclaimed by nature.

“It's the quality” (but probably also the drive-through donut tunnel) that has attracted diners since 1968.

A beautiful little bookshop located in the middle of a desert.

The ruins of a pre-Columbian fortress city so secure it held off the Spanish conquistadors for over 20 years.

This retro underwater observation tower would make the perfect lair for a sea-loving villain.

This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

Don't blink or you'll miss it.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

One of the last active volcanoes on the Eastern seaboard.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.

The beautiful 1920 Pantages Theatre remains hidden just underneath the LA Downtown Jewelry Exchange.

Historic marionette theater features thousands of handmade puppets and free cups of ice cream.

The final resting place of a space program monolith.

This rare tortoise skeleton has been hanging around the downtown Los Angeles museum for over a century.

The legendary building that needed ghostly approval before being built.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.