A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

Northern Ireland's Brobdingnagian stepping stones.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

An unusual round church in London with a Templar past.

The atmospheric road was never meant to be so creepy.

A tongue-in-cheek arcade where the games are based on everyday life.

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.

This South London cemetery holds the remains of more than 15,000 people.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

These fantastically named natural pools look like something out of a Scottish myth.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

This ruin in a suburban park may be the place where Shakespeare's "A Midsummer Night's Dream" was first performed.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Every color in the rainbow awaits.

Elevated freight railway turned wildly successful urban park.

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

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

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

The oldest surviving synagogue in New York City is now a soaring art space.

The tiniest little stage in New York.