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.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

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

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This church houses the “incorrupt” body of its founding Bishop.

Every weekend, the parking lot of this Buddhist temple turns into a Thai street-food paradise.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.

Resting place of Hollywood's immortals is also site of summer film screenings.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The decor of this Hollywood movie palace just barely predated the opening of King Tut's tomb.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.

Three hundred years of preserved Spanish colonial history in San Antonio.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

This eclectic Austin curiosity shop is home to all things strange and unusual.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

There is only one place in the world where the corners of four nations come together.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

These roaring primates were considered a divine creature in the cosmology of the Maya.