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

The watery grave of an impractical idea.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

This taxidermic smorgasbord was co-created by an artist poached from the Museum of Natural History.

Journey through the largest remaining peat bogs in the contiguous United States to see the wilderness as it once was.

This Minnesota town celebrated the state's 100-year anniversary by creating a massive ode to nature's smartest bird.

A spooky defunct railroad tunnel now part of a sprawling trail.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

A riverside park built around the ruins of a massive dam that collapsed in 1909.

17,400 lbs., 12 feet in diameter, and 29 years in the making.

This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

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

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

A museum within a museum, devoted to history's most questionable medical devices.

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

A treehouse assailed by the elements and the government, now gone.

A hidden oasis in the heart of Minneapolis is also an Important Bird Area.

Come for the giant taxidermy lion, stay for the knick knacks at this Minneapolis curiosity shop.

Direct, creative challenge to Mother Nature's winter wrath.

This iconic water tower and failed bandstand is open for panoramic views once a year.

One of two giant blue cockerel statues erected with an intentional double meaning.

A Perpetually Under construction Park.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

This lab's maddening silence is good for business but bad for sanity.