This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

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

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

The final resting place to 300 Victorian-era pets hides inside the city park.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Climb inside an iron crystal magnified 165 billion times its normal size.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

An abandoned town centered around a paper mill powered by a large waterfall.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

From lefty Jewish gathering site to hip cultural site in just 80 years.