A psychedelic labyrinth on the San Francisco bay.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

With the touch of a button, you can read a randomly selected short story.

A partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

Cryptic messages embedded in the New York City sidewalk.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

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

Banksy gives themself artistic license with this piece of London street art.

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

A strange house built only at night, with rumored mystic inspiration.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

New York's oldest and possibly grandest keeper of books.

A legendary speakeasy bookstore returns from the brink.

An unassuming secret door once led to a legendary watering hole.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Try not to get slimed in Tribeca.

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

Some of the tallest ancient American ruins continue to inspire awe and curiosity.