A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

A jewel of early electric boosterism once again charms Connecticut's historic "Hat City."

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

A mysterious, abandoned building rotting on the Brooklyn waterfront.

You must take the A train... to the last active cemetery in Manhattan.

If you were standing here on October 5th, 1950, you'd be dead.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

Brooklyn vintners creating world-class wine in a city not known for its vineyards.

The right to a full beard is honored by the grave of a man who was attacked and jailed due to his facial hair.

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

Church and home-museum of a 1920s female revivalist preacher with a very sordid past.

The birthplace of a titan of American cinema.

The only house built with a turret, crenellations, and a moat in Palmer, Alaska.

This storybook New England home is actually a decommissioned lighthouse.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

A memorial to the unknown and unheralded men and women of the Cold War military and intelligence services.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Over fifty whirling pools left by the glacial age.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

Remnants of the United States's largest accidental oil spill still mar a California valley.