It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Most famous work of one of Frank Lloyd Wright's sons.

A castle that was built stone by stone by an eccentric journalist.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

The site of the deadly Triangle Shirtwaist Factory Fire.

Elevated freight railway turned wildly successful urban park.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

A whimsical, but often overlooked clock in Park Avenue.

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

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Read a book next to a Midtown waterfall.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

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

An accidentally hidden library containing the ephemeral history of New York.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.