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

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

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

One of only two commuter aerial tramways in the United States.

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

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Elevated freight railway turned wildly successful urban park.

A Manhattan office building is home to the world's largest chess board.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

A dilapidated dock tells the story of Titanic's missed arrival.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

This huge work of functional public art replaced a landfill in New Jersey's Meadowlands.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

A unique sculpture park that specializes in the huge and bizarre.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

A world-class collection of mechanical musical instruments and automata.