A single handprint, which, according to Ohio State University legend, cannot be scrubbed off.

The tiny church offers succor to travelers driving by, but only eight at a time.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.