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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Ship-sized kinetic sculptural fantasy.

This 1920s Dutch barge is now a floating bookstore.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

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

A student driver's nightmare.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A miniature view of the park, caught in time.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Elevated freight railway turned wildly successful urban park.

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

A floating cat sanctuary on an Amsterdam canal.

A grassy pyramid named after a French battle.

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

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