This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

A mocking tribute to the past and modern leadership of Prague.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Visit the monolithic tomb of America's most famous general.

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

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A modern addition to the Greenpoint skyline.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

There must be a pun in this haystack somewhere...

Commemorating the spot where the famous scientist fed his pigeons.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

A bit of retro transportation flair preserved in the world's largest department store.

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

A strip of modern stores in historic buildings.

A semi-scholarly approach to sex.

An artist's cute bronze subway sculptures belie his violent artistic past.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

On the Hudson resides one of the largest clocks in the world.

The most confusing clock in New York.

A notorious punk house turned co-op.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.