Not one, but two of Frank Lloyd Wright's architectural masterpieces nestled on the same street.

Play everything you see at a museum dedicated to a town's historic organ industry.

This tiny patch of arid sand sits in one of the greenest states in the United States.

New Jersey's last historic covered bridge was rebuilt from pieces of the original 19th-century structure.

This railroad tunnel was once the longest in Massachusetts.

A whimsical, but often overlooked clock in Park Avenue.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Cryptic messages embedded in the New York City sidewalk.

This collection of grinning ephemera has grown from basement to Brooklyn.

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

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

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

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

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

Wine bottle sculpture with a ship's stateroom inside.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

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

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Detailed facade of a brownstone in Boerum Hill.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.