The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

Hidden in the Santa Ynez Mountains off Highway 154, this tiny restaurant once served as a stagecoach stop.

California's largest steel arch bridge.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Gander at model satellites and telescopes in this scientific lobby.

This odd California folly seems like it was almost designed to accumulate urban legends.

From the Difference Engine to the Cray-1, all under one roof.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A vast city of the dead, where the deceased outnumber the living by more than a million.

The secret city built by the Manhattan Project.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

The location where the American Revolution ended.

A collection of vehicles across American military history.

The maritime museum that boasts the largest nautical library in the western hemisphere.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

The Cadillac Ranch for monster truck aficionados.