One of the few surviving examples of the first lock and dam system built on the Ohio River.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

A memorial honoring those who perished in one of the worst construction disasters in U.S. history.

This abandoned amusement park was built on a site with a dark history.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

A Nessie-like monster supposedly lurks in this lake.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

The notorious couple camped at this site after a bloody shootout with police.

This remote island in Iowa was abandoned after being devastated by flood.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

Visitors come from all over to bring gifts and tokens to the grave of Alice, who is thought to have died of a broken heart.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

The final resting place of the Seminole Indian chief who fought against government occupation in Florida.

Paths are maintained, but trees have taken over plots.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

An unfinished rail tunnel that has since been used to house cheese and bats.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

The remains of a chapel created for convenience.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

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