Collapsing castle on the Hudson river was once the storage site of military surplus business.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

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 fancifully decorated Victorian home in New York’s Hudson Valley is the only known fully domed octagonal residence in the United States.

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

A beautiful, historic location open to the public.

Collect holy water from a Bronx grotto.

Because holiday cheer is at its finest when it includes eerie mannequins, right?

A century-old historical movie theatre that plays a mix of independent and mainstream films.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

A haunted slate mine turned concert hall and a hidden fairy garden.

In the 9th-century this small spring-fed well became the location of daily mealtime miracles for one Saxon monk.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

400-year-old garden, restored to beauty.

This ruined 15th-century hermitage is steeped in myth and mystery.

A 14th century castle built on the seat of a mighty giant.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A open air theatre built on a cliff by an eccentric British woman.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

This tidal island, a sacred site in early English Christianity, was the target of a notable Viking invasion.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

A public park off the beaten path with a beautiful waterfall and 13th century Cistercian abbey.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Series of underground houses inhabited continuously for centuries.