Explore the flooded remains of a limestone mine in Kentucky.

The world's longest known cave system.

The alley connecting two of country music’s most historic venues has a rich history of its own.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

FDR hoped to find a cure for polio in this Georgia town's warm springs.

An annual celebration of the region's successful elk reintroduction program.

Supplies are schlepped up by llamas at this century-old inn, accessible only by hiking trails in the Great Smokies.

An abandoned town is hidden in Great Smoky Mountains National Park.

One of the last remaining pedestrian suspension bridges in North Carolina.

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

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

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

Stroll among more than 50 large-scale sculptures created by world-class artists.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

A historic gristmill that still produces flour and grits the old-fashioned way.

A 19th-century mill complex once powered by three waterways still leaves visible traces in the woods.

Measuring 100-feet tall, the Gennett Poplar is the second-tallest tree in Georgia.

This hillside mushroom farm shares land with a Buddhist monastery.

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

This pavement line and accompanying statue commemorates the starting point for the world's oldest annual marathon.

Cape Cod’s historic beacon made famous on a potato chip bag.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.