This shale formation along the Appalachian Trail once inspired the third president of the United States.

The house where John Wilkes Booth conspired with his co-conspirators.

The grave of a champion Thoroughbred hides within the former presidential estate.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

Home to the first child born to English colonists in North America, this colony mysteriously disappeared while waiting for supplies.

Its original statue was deemed so ugly, locals called it “Scary Lucy.”

This Civil War monument was designed by an eccentric architect and Gettysburg veteran.

Long before the Battle of Gettysburg occurred, dinosaurs roamed the area and left their footprints on this bridge.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Experience the pivotal Civil War battle at this interactive museum.

This large stone residence served as a field hospital during the Battle of Gettysburg between stints as a tavern.

This Pennsylvania structure, the oldest building in Gettysburg, was once a stop on the Underground Railroad.

Home of the only civilian casualty at the Battle of Gettysburg.

Feel what it would have been like to live in Gettysburg during the pivotal Civil War battle.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

This museum is dedicated to a Hollywood icon.

The first and only American institution dedicated to the enduring value of comedy in the United States.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

First established in 1696, this settlement was abandoned after the Revolutionary War.

Tour the oldest unrestored plantation house in America that is open to the public.

One of the oldest living oak trees in the Southeast.