An abandoned relic of the city's failed experiment with below ground transit.

The oldest brick house in the state of Ohio.

The only freestanding table rock formation east of the Mississippi.

A 70,000-square-foot institution dedicated to a very literal, creationist perspective on the Book of Genesis.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

This structure among the trees was the result of divine inspiration.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

Inside, ancient treasures. Outside, modern contradictions.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

What is it about mushrooms that makes people wish they lived inside of them?

This mysterious hill seems to pull objects uphill.

A historic hotel library in Indiana hides more than a few secrets on its shelves.

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

Unique tower has outlasted a takeover of the company.

The history of whiskey and all of its boozy glory, from Colonial days to modern American cocktail culture.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

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

This cave holds a surprisingly colorful variety of geological oddities.

A bizarre house filled with an astounding array of collections.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.