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

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

This 1920s Dutch barge is now a floating bookstore.

A student driver's nightmare.

Hidden beneath the streets of London is a secret subway that only carried mail.

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.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

A Yiddish theater turned movie house turned rock and roll landmark turned gay disco turned bank.

Four cars from the old system were once on display, but were removed in 2014.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

The tiniest little stage in New York.

A graffiti Mecca welcoming artists from around the world.

Haven for steampunks.

The saddest little diner in New York.

An accidentally hidden library containing the ephemeral history of New York.

A retired subway car stands alone in a field in the middle of Queens.

A huge resale shop for the cast-offs of the film & television industry.

Three-story slide through the New Museum.

A legendary speakeasy bookstore returns from the brink.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

How a century-old glass factory in Queens became a concert venue and arts center.

This diesel train serviced the Brooklyn waterfront for more than three decades.