This cave holds a surprisingly colorful variety of geological oddities.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

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

A jaw-dropping brutalist space church seems to have crash-landed in the middle of America.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

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

The watery grave of an impractical idea.

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

The only arched bridge made of stone on the entire Mississippi River.

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

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.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

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

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

When waves crash onto this section of beach, the rocks sing a song.

20,000 pieces in a Frank Gehry-designed building.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

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

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

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

A giant Troll lurks under one of Seattle's oldest bridges.

"...I guess that was your accomplice in the wood chipper?"

These former Cold War launch sites have been preserved for tourists to see where the button might have been pushed.