A rural hall of justice holds the world's only comic book and superhero museum.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

The only freestanding table rock formation east of the Mississippi.

One man's vision and a labor of love of many.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

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

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A medical facility that has been kept frozen in time.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A restaurant and lodge in northern Wisconsin which served as a clandestine hideout for John Dillinger and featured one of the most famous botched FBI raids in history.

A small town museum celebrates the history of the Ohio county that produced Annie Oakley and other famous figures.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

Remnants of 19th century vigilante justice.

Ohio's 19th-century communist micro-society.

Featuring one of the most complete and original collections of Presidential memorabilia, this is the site of the last front porch presidential campaigns.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

Now in disrepair, this 19th century station was a stop on of the famed B&O Railroad.

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

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

In this relatively flat state the highest point is an honored place.