Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

At 207 feet, one of the world's longest continuous escalators.

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

Art deco landmark on the outskirts of Washington, D.C.

An astounding collection of medical specimens, including bits of President Lincoln.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

A priceless collection of the Nation's cryptologic history.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

Remnants of a storybook amusement park hidden behind a strip mall.

Eighteen miniature death-scene dioramas.

Walk through the history of American pop culture.

A Civil War Museum with some notable medical antiques.

The site of the climactic scene from the classic horror film is now a historic landmark.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

America's Most Wanted's set resides in this tribute to the history of crime and punishment.