Center filled with hands-on displays served as a tribute to several astronauts with connections to the state.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

A miniature world of concrete and stone in Springfield, Ohio.

This restaurant proudly displays bread signed by the 39th president.

Charming bookshop for true-crime fans and horror aficionados, plus other books and odds and ends.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

Beautiful scenery, history, science, and physics come together in this remnant of shipping lore.

Over 60 chemical plants and oil refineries sit in a 15-mile-wide section outside town.

Perched atop a brick smokestack, this enormous lug nut symbolizes the local minor league baseball team.

This freshwater spring fills with 10,000 gallons of water per minute.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

Watch the ships come in on Michigan's 210 ft. high observation deck in Sault Ste. Marie.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Strange physical sensations and optical contradictions keep visitors coming back for more.

This nearly 200-foot tall limestone stack offers visitors amazing views and a chance to meet Paul Bunyan and Babe the Blue Ox.

This shallow cave got its name from copious amount of human bones found inside.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This lovely public park has an intriguing past and unique wooden bridges made of concrete.

A comprehensive archive of Hallmark Holiday ornaments.

The only surviving prototype for Buckminster Fuller's house of the future.