A subterranean playground in an abandoned slate mine.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

These haunting ruins belong to an ancient village that once had one hell of a view.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

Once America's tallest structure, now a Baltimore landmark.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

Canada's largest dinosaur skeleton was hidden away in storage for more than 40 years.

One of Ireland's most infamous prisons for rebels including men, women and children.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Meet manatees face-to-face at this zoo for native species.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

The site of the climactic scene from the classic horror film is now a historic landmark.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

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

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

New York's southernmost subway station is whimsically wavy.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.