This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This one-room cabin where the young colonel slept during the French and Indian War.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

One of the only memorials dedicated to journalists who died in combat.

Built by the patriotic residents of Boonsboro in a single day.

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

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

A toxic ghost town sitting atop a massive coal fire.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Where America's first doomsday cult awaited the end of the world.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

A daily replay of the experiment that proved the rotation of the Earth.

Yo, Adrian!

World's first "penitentiary," meant to be humane, drove men insane.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

The highest point in Washington state is a volcano covered in glaciers.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.