This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Steep canyon walls hide a forested oasis in the West Texas desert.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The second largest roadrunner in the world stands 11 feet tall in his West Texas town.

Once the smallest park in the national system.

Where monkeys run wild and the humans are caged.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

A historic hill of tall tales, with one rather special tree.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Eclectic final resting place of the controversial explorer.

A naturally mummified 2,000-year-old man.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

A controversial art piece that harkens back to local folklore.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.