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

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The smallest covered bridge in Maryland.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

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.

Life and death are on parade at the most reliably perilous site of “the Great Migration.”

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

The second-largest giant sequoia in the world.

This local mascot has been a presence in the area since the 1960s.

This museum sits on the site of a decommissioned military communications base.

One of the oldest standing structures in Montgomery County, Maryland.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The oldest existing one-room brick schoolhouse in Loudoun County.

Illegal drag racing two stories beneath Chicago’s streets.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.