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

This building contains handprints that are well over a century old.

This park offers a variety of sights and activities including trail rides and buffalo sightings.

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

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

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

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

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

Elvis's own personal tropical hideaway.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

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

Home to drunken tower-climbing goats... seriously.

Mile-long cave system near Great Smoky Mountains.

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

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Enormous lake at the bottom of a unique cave system.