Lie in a hammock where George Washington stood.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

Once America's longest-manned military fort, now an abandoned hulk.

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

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Peek through the gates at this oasis from the city, full of Old English charm.

A hidden "place of interment for gentlemen."

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

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

Elevated freight railway turned wildly successful urban park.

This former crime corner has been turned into an eclectic community center.

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

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

A crumbling hospital from the 1850s on Roosevelt Island.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

Read a book next to a Midtown waterfall.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

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