Enormous lake at the bottom of a unique cave system.

Home of an evil witch famous within southern folklore.

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

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

This structure among the trees was the result of divine inspiration.

A key producer of charcoal iron in the early 1800s, the structure still stands today.

A reclusive Memphis neighborhood is home to decades worth of misunderstood Masonic folk art.

The first full-scale tunnel built in America is short but scenic.

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

Walk the whole Mississippi River!

Visit this playground of waterfalls, caves and sinkholes.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

A lush green oasis in the middle of Chicago.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

The Kalamazoo factory has 100 years of instrument-making, and one big wartime secret.

Center filled with hands-on displays served as a tribute to several astronauts with connections to the state.

Origin of the blue-skinned Fugates of eastern Kentucky.

The oldest experimental corn field in America is still creating better ways to grow crops.

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

Symbolic attempt to overcome the issues of life.

A real flying saucer, contracted by the U.S. Air Force.

The largest earthwork effigy in the world.