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

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

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

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

This historic London residence was once the womb of Scientology.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

This London marker celebrates the spot where the world-famous English band was founded.

Tucked away behind the mansions of Mayfair, this picturesque garden is a hidden London treasure with a spooky past.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A mysterious artist-run cabinet of curiosities and library.

One part local history, 99 parts gruesome haunted house.

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

A hidden path at the National Theatre lets you look behind the scenes of the latest productions.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

The broken skateboards that became a poignant memorial to a murdered skater.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

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

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

A burial vault located under Tiber Island in the middle of the Italian capital.

This is the oldest Roman-made bridge in the city still existing in its original state.