Georgia's first brewery is also one of its oldest surviving buildings.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The oldest continuously occupied public building in the United States.

This bird-shaped rock formation defies gravity, time, and classification.

The remains of a historic ranch house that witnessed the Civil War battle dubbed the “Gettysburg of the West.”

The most powerful laboratory radiation source in the world pulses with 1,000 times the electricity of a lightning bolt.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

The ruins of this abandoned fort now stand as a picturesque reminder of America's march West.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Legends surround this jagged rock formation in the New Mexico desert.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

Mariners once used this prehistoric landfill as a navigational landmark.

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

A relic of FDR's brief foray into utopian urban planning.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

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

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”