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 unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

At the base of the Spring Mountains, a unique nursery packed with desert plants.

The most extravagant car collection features a Batmobile, Liberace's mirror ball-ed Rolls Royce, and a stunt car from 'The Fast and the Furious.'

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

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

Get fishing gear and craft beer at this restaurant on the pier.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

Where the alchemists dream of transmuting base metal into gold was actually achieved.

Contractors in this Oregon town have been stamping their names in sidewalks since 1908.

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

An enormous illuminated figure dances on the Las Vegas strip.

Enormous photography collection housed in a study center co-founded by Ansel Adams.

Handmade treasures from around the world.

This collection of hand fans doubles as a history of femininity.

It was once the base for a series of domestic terror attacks.

Washington's iconic carousel has a nice piece of Civil Rights history.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

An overlooked memorial honoring the local Washington residents who died in World War I.

The 28,000-year-old specimen is remarkably intact.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.