This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

The site of the Scopes Trial contains a small exhibit dedicated to the famous case.

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

Live long and prosper in Tennessee.

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

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Follow the steps, and this roadside artwork will teach you how to dance.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

This historic train station has been converted to a locomotive themed hotel.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

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

The national park was once a plantation estate.

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

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

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

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

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

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

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

The narrowest house in America is seven feet of pure spite.