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

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

Walk over a 150 year old manhole.

The famous author's cottage hideaway.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

A former connection to City Island, it has been abandoned since the 1930s.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The loneliest island in New York.

A controversial magical figure is hidden within a diorama of the city.

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

A beautiful, historic location open to the public.

Surrounded by low rise buildings and partially converted into an auto body shop, this marble archway is the only vestige of a forgotten Manhattan estate.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

The "Skinny House" is made from scrap, salvage, and a neighbor’s kindness.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.