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

A bizarre house filled with an astounding array of collections.

Its collection contains relics from the devastating disaster that set the town ablaze.

Inside this museum resides a boot fit for a giant.

Home to a vast collection of The Wizard of Oz memorabilia and the site of an infamous theft.

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

The world's largest floating loon bobs in the lake to kick off an annual festival.

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

The oldest remaining frame residence in Minneapolis.

This water tower has been a staple of the Rochester skyline since 1931.

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

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

.

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

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

An abandoned bus station transformed into a museum dedicated to the history of Greyhound Lines, in the place where it all began.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

An amazing collection of sculptures and art.

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

The watery grave of an impractical idea.

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

A stone face watches over the river.

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

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.