This replica of the Greek structure is in the heart of Nashville.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The world-record holder for the longest bridge stretching continuously over water.

Tucked away in the forests of North Florida resides a 19th-century lighthouse.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

"We Seceded Where Others Failed."

Near the ruins of a Civil War coastal fortress lies the only known African refugee cemetery in the United States.

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.

The smallest post office in the United States is no bigger than a broom closet.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

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

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

Hidden amid the old-world charm of Savannah is a museum dedicated to the world of oddities and criminal history.

A statue honoring 44 continuous years of greeting passing ships.

Washington's iconic carousel has a nice piece of Civil Rights history.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

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

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.