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

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

Live long and prosper in Tennessee.

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

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

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

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

Mile-long cave system near Great Smoky Mountains.

One man’s religious convictions led him to build this stone castle meant to withstand an apocalypse.

A historic dam made famous for its turbines and feature in a Hollywood classic.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

This video store is a horror buff's dream.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

The secret city built by the Manhattan Project.

The collection of a paranormal investigator who traveled the country collecting haunted items and stories.

These early tent-shaped grave coverings are unique to Appalachia.