The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

Part of a worldwide art project, this mysterious semicircle of concrete shapes holds the pieces of a larger story.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

Home to a collection of artifacts and specimens from one of the world's preeminent geologists

Symbolic attempt to overcome the issues of life.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

Thousands of unique minerals, including some of the most impressive fluorite crystals in the world.

The fourth-oldest baseball stadium in the United States is in a league of its own.

The world's longest known cave system.