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

The highest point in Maryland is only accessible by hiking through another state.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

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

Built in 1945, this historic train station has a new lease on life with its baggage area serving as an event space.

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

A pink and gray pair of pachyderms advertise a fireworks shop.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

The site of the one and only battle of Lord Dunmore's War.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

One of Cincinnati's greatest fighters once trained at a now defunct gym in this Over-The-Rhine neighborhood.

The oldest brick house in the state of Ohio.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

This forgotten boat elevator was an engineering marvel in its heyday.

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

A derelict bit of transportation infrastructure hidden in the woods.