This inn of the court provides a fascinating window into London’s legal and architectural history.

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.

This 1920s Dutch barge is now a floating bookstore.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.

Disused penal colony features prisoner artwork, some sketched in human blood.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

One of the last Art Deco gas station still standing in Dallas.

The "world's smallest volcano" has been used to store meals and dispose of dead bodies.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

This wildlife refuge is home to more than 200 species of birds, as well as monkeys, lizards, and other wildlife.

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

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

The glowing blue Nymphaeum of Emperor Tiberius.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Legends surround this jagged rock formation in the New Mexico desert.

The longest living non-clonal organisms on Earth.

The hallucinogenic center of the ancient world.

Once a black market electronics marketplace, now an otaku shopper's paradise.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.