A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Oldest building in California still in use.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

In paradise, feral pigs have claimed an island all to themselves.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

Inside this casino, visitors are treated to slot machines and a rare German Christmas pyramid.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

One of few remaining antique carousels with stationary animals in the U.S.

The remains of a World War II-era Japanese American internment camp dot a windswept Colorado hill.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

The highest bridge in America was built for an almost unnervingly small amount of money.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

The surprising home of the iconic Santa Monica Pier Ferris Wheel.

This little slice of old Jerusalem in Oklahoma is the evolution of a 90 year old passion play.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.