The remains of this visionary community can still be found much as it was a century ago.

This ghost town houses the remains of Alabama's old state capital.

A swamp and garden tour featuring local wildlife and exotic botanical specimens from around the world.

The 10th-tallest pyramid in the world, this former sports arena is now home to a massive Bass Pro Shops store.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

If astronomy had a ghost, it would look like this observatory.

Prehistoric animals decorate this popular outdoor park.

An abandoned theme park with a strange and tumultuous past.

Amazing taxidermy dioramas from the 1960s in a cement building meant to look like an ice cave.

One of the few surviving "Wigwam"-themed motels.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

It's believed the famed author's parents once used this spring to gather water.

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

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

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

Mile-long cave system near Great Smoky Mountains.

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

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

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

An enormous goose sits atop this nest-shaped home.

This abandoned building with a murky history has been both a school and a prison.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.