Home to secret Eastern Bloc spy equipment and the largest stretch of the original Berlin Wall outside of Germany.

Along a California highway is a kind of Jurassic Park made of metal.

This temple, built by an eccentric religious leader before his death, sits guarded and in ruins.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

A ring of creosote bushes that are estimated to be 11,700 years old.

A building so large that it has its own weather.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

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

Advice-columnist's bell tower, paid for with pennies.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

World War II-era Nazi compound nestled in the Santa Monica hills.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

Elevated freight railway turned wildly successful urban park.

Unrepaired walls from a 1920 anarchist bomb attack.

Home to more than 13,000 pieces of war memorabilia and military equipment.

A black and white mural stands out from its psychedelic surroundings.

An unusual round church in London with a Templar past.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A sharp bend in a dramatic river canyon cut through red rocks.

A spiritual vortex among the red rocks in Sedona.

An homage to everyone's favorite prehistoric cartoon family.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Oldest building in California still in use.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.