This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Experience a charming 1930's version of "infotainment."

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Odd outsider art installations surround a Gold Rush-era ghost town.

A land of debatable treasure.

An urban laboratory.

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Oldest building in California still in use.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

A "haunted" landmark on the coast of Southern California.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

This unusual building straddles two countries.

A museum dedicated to exhibiting remarkable outsider art.

Dr Barnes' $25 billion private collection of art and arboretum.

An outlandish shoe shaped house built by an eccentric millionaire.

The Decoy Capital of the World.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

The oldest farmer's market in America is so ancient it was approved by the King of England.

The first of Lancaster's "rural cemeteries."

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.