This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

Ride the subways of yesteryear.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Holding the most bodies of any cemetery in the United States.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A semi-scholarly approach to sex.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

London's smallest police station is barely the size of a phone booth.

Sniff the Titan Arum's rotting flesh.

A town trapped in time - 1958 to be exact.

A graffiti Mecca welcoming artists from around the world.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.