An overlooked collection of over 350,000 artistic works created by psychiatric patients using art therapy.

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

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This overlooked street light once served as a KGB dead letter box.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

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

An unexpected desert oasis in South America.

Great Britain's only hat-making museum.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

This 700-year-old street food market features baby octopus and soy donuts.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

In this century-old literary safehouse, print is alive and well.

Early prototype for Frank Lloyd Wright's Guggenheim.

Its buzzing collection honors vibrator history.