The former hotel where Tesla invented the radio.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

Cryptic messages embedded in the New York City sidewalk.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Peek through the gates at this oasis from the city, full of Old English charm.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

London's most popular recording studio, located in the capital's East End, runs partly on solar power and has played host to some of the world's biggest acts.

Murals of the wild parties once held on the frozen River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

A six-ton wedding present for the King of the Scots.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

A 18th century graveyard and its astonishing cortege of macabre iconography.

The final resting place of soldiers' loyal canine companions.

A sweet symbol marks the place where torturous executions were once carried out.

Ancient cliffs resembling a kilt on Scotland’s second-largest island emit an entrancing sound.

The heads of two giant mythological water horses honor Scotland's horselord past.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

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

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

The cedar tree in Highgate Cemetery earned its title by accident.