The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

The California capital city once stood 10 feet lower than it does today.

A plaque outside the San Jose airport commemorates the insect's arrival to the West Coast.

The headquarters of a secretive order is also a beautifully-designed park.

A bizarre house filled with an astounding array of collections.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

This enchanting forest trail leads to ethereal abodes and a giant bird's nest.

The grandiose interior of this bar speaks to its past as home to famous jewelers and railway offices.

From Japan to Italy, this California park explores the world's cultures through their gardens.

As the aging humans of this Japanese village die off one local artisan is replacing them with eerie homonculi.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This shallow cave got its name from copious amount of human bones found inside.

Opulent downtown movie theater now houses cars as an indoor parking garage.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

Dilapidated Mayan-themed ballroom was one of Detroit's most popular venues through the 40s.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

European castle ruins in an American state park are actually the product of death and grief.

A celebration of the animation wizard's childhood home and antique railroad memorabilia collection.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

This Kansas City studio was home to Walt Disney's first animation business.

This quaint museum lets you take a ride on its antique carousels.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

Curious rock formations in a tiny Kansas state park.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.