The author of Uncle Tom's Cabin was neighbors with Mark Twain while living in this Connecticut home.

The headquarters of the famous Yale society.

The eccentric mansion of one the most popular horror authors of modern times.

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

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

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

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

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

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

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

Electrical pylon in the shape of Disney's beloved mouse.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

A historic presidential getaway on the continental United States' southernmost island.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

"We Seceded Where Others Failed."

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.