Guns that have been defending San Francisco since 1904.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

The "Seinfeld" diner.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

This Chase branch is an homage to Old Hollywood.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

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.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

No one knows how many bodies are in this vault in a Chicago public park.

The unbelievably opulent home built for an infamous newspaperman.

A tribute to the "toughest woman on the Texas frontier," who survived a famous battle and five husbands.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.