This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

A former major munitions plant that has been converted into a sprawling art space.

Coca Cola may be "the real thing" but its inventor, buried at this Georgia gravesite, called it a "valuable brain tonic."

This kitschy tavern is also home to rare early editions of "Treasure Island."

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

Enormous lake at the bottom of a unique cave system.

The national park was once a plantation estate.

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

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The site of the climactic scene from the classic horror film is now a historic landmark.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

Wedged between two sets of row houses is an awkwardly located family graveyard.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

The final resting place of the Seminole Indian chief who fought against government occupation in Florida.

A quirky Poe-themed joint on an island keen to celebrate its overlooked connection to the famous writer.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.