Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

It would take 35 firetrucks to fill this enormous glacial pothole.

This park contains a number of standing stones meant to heal and inspire.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

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.

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

This 12-foot-tall T-rex is the largest K’Nex skeleton sculpture in the world.

This 880-acre facility is home to a massive collection of vintage motorcycles and cars, as well as a 2.38-mile race course.

Once one of the largest producers of pig iron in the world.

A unique book shop with a collection of rare tomes and a nostalgia museum.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Every last book in this bookstore is signed by the author.

The remains of a foundry and old blast furnaces destroyed during the Civil War are preserved in this central Alabama park.

Orr Park's dead trees have been carved into a menagerie of whimsical visages.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

Abstract marble carving for an 8.5-pound rock.

In Rickwood Caverns, visitors can travel hundreds of feet underground and see beautiful formations unique to the region.

A miniature city built by a single hunchbacked monk.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.