Former self-sufficient mental institution now a planned community.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

An abandoned fish-shaped drive-in gets a second life as a restaurant.

This cave holds a surprisingly colorful variety of geological oddities.

This large midwestern cavern features impressive rock formations and an underground waterfall.

Duluth mineral magnates built this charming art deco lodge to be their private clubhouse.

Half of a waterfall goes into the river while the other half seems to disappear.

A giant granite cross remembers missionary Father Frederic Baraga, and his safe passage across an angry Lake Superior.

This friendly fellow was built to honor an advancement in mineral processing.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

A winged-helmed, sword-brandishing tribute to German Americans.

These curious caverns have been home to mushrooms, gangsters, and disco.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Built in 1931, this small passageway is believed to be the first modern skyway.

This statue of Olympic hockey coach Herb Brooks immortalizes one of the greatest moments in American sports history.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

The literary king of the Jazz Age was born in this lovely Minnesota home which still honors his legacy.

A piece of solitude and tranquility in the heart of East Saint Paul.

This quirky roadside attraction provides insight into Minnesota's logging history.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

Each year, one talented artist puts on a show sculpting twelve butter-based busts of dairy princesses.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

When flour explodes, it's not a pretty sight.

An old soap company building now houses one of Minneapolis’s oldest independent non-profit art galleries.