A popular 19th-century natural landmark is now hidden within a sprawling forest.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

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

A Borgesian work of art that may blur the line between fiction and reality a little too convincingly.

The history of Mar Behnam Monastery is that of violence, intolerance, resiliency, and spirituality.

These unique stained glass windows were designed by local children using a modern flair.

This foolish Victorian sea fort was converted to a deluxe hotel.

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

This plaque marks the spot where the first crossing guards helped get kids safely to school.

This double-arched masonry highway bridge is the only structure of its kind in Minnesota.

Dakota legend claims this locally iconic pinnacle was once part of a sacred burial site that was cleaved in two.

A futuristic climate change study is nestled deep within this public land.

During World War II the Thorp building was guarded by the OSS, FBI, and US Navy because of the top-secret bombsight being produced there.

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

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

Terraced flowerbeds and rock sculptures in the midst of the Minnesota wilderness.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

This Minnesota-shaped forest is actually located in the state it is shaped like.

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

This vintage "streetcar boat" lay at the bottom of Lake Minnetonka until the 1980s.

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

A haunting army of decomposing, moss-covered stuffed animals and dolls guard this swinging truss.

Minnesota's highest point is a scenic vista marked by a plaque and armies of mosquitoes.

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