Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

One New Hampshire alleyway has become home to a public gallery of feline art.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

Site of the graveyard vine believed to be a curse on a family from the 1800s.

The house where Rudyard Kipling wrote the Jungle Book is also the location of the first tennis court in Vermont.

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

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

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

One of the largest public collection of historic armored and military vehicles in North America.

An elaborate, hidden model train in the Needham Town Forest.

America's "second most important bell" is a contentious spoil of the Civil War.

This classic red schoolhouse is said to have been where Mary and her little lamb went to school.

A beautiful Victorian-era cemetery, complete with a miniature village.

The site of the tragic isolation of Nipmuc Native Americans left to perish in King Philip's War.

The homestead of American patriot John Adams.

Site of the creepy house used in Lucio Fulci's "The House by the Cemetery."

This mysterious artificial cave has long puzzled New Englanders.

The Burnside Fountain and its questionable interpretation.

This 50-foot rock formation looked like a face that was once believed to be that of a Native American chief.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.