Ornate limestone building now filled with geologic specimens, and more.

The world's largest collection of mechanical puzzles is a cornucopia of analog bafflers.

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

This mysterious hill seems to pull objects uphill.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

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

One of the largest collections of merchandise from the famous British sci-fi show can be found smack in the middle of Indiana.

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

A collection of over 2000 air-moving devices of all kinds displayed in the Fanimation headquarters.

A medical facility that has been kept frozen in time.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

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

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

This moving cemetery sphere is a slowly rolling stone.

The largest historic preservation organization in the United States.

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

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

"You can only scalp a customer once, but you can give him a haircut every two weeks"-Barber's Maxim.

Artifacts fill the old headquarters of the hugely influential political movement to ban alcohol in the United States.

The childhood home of one of Ohio's favorite sons, pilot and war hero Eddie Rickenbacker.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

A retro walk through the history of the tube.

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