An unassuming secret door once led to a legendary watering hole.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

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

This derelict building used to house infirm Freemasons, their widows, and orphans.

Stumps of an Ice Age forest, visible only at low tide.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

A recreated sign from the movie Jumanji has become a makeshift tribute to the film's late star.

Nature and religion are reunited at this unconventional church in the forest.

This small stone chapel is a hidden gem just outside the University of New Hampshire campus.

Scene of the grisly murder of two Norwegian women in 1873.

The New England cabin where an infamous British occultist conducted experiments in "magick".

Even Henry David Thoreau found this glacial pothole irresistible.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

A monument to the Mohawk people stands along an old Native American trade route.

This dam in the woods, built by Henry Ford with only manpower and oxen, holds no water and serves no purpose.

Hill-like structures formed by glaciers and sandy spits of land.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.