A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

Beautiful waterfalls grace a canyon visibly torn by a violent tornado.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

A local scoured more than 1,000 acres for stone to create his masterpiece.

Outstanding collection of 19th century medical instruments includes a life-size figure cast from as many as 200 cadavers.

An enormous natural sandstone bridge in Kentucky.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Moonbows over Kentucky.

An abandoned theme park with a strange and tumultuous past.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.

Hot Doug's "Hot Dog" Stand.

Once known as the Illinois Asylum for the Incurable Insane.

Moving, mind-blowing metal sculpture work of an outsider artist.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

A Museum of Holography frozen in 1974.

A century-old network of freight tunnels underneath the city's historic business district.

This former nursery supplied plants for the creation of Chicago's largest park.

The faint remains of a Polish news empire still linger.

An abandoned observatory in the middle of the Illinois prairie.

A former atom smasher turned into an art gallery.

An exhibit of items from the mental institution where Mary Todd Lincoln lived after her son conspired to have her committed.