This cave holds a surprisingly colorful variety of geological oddities.

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

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

This sprawling building built in 1890 was one of Minnesota’s earliest and largest mental health facilities.

The world's largest otter started his life as a high school shop project.

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

A mysterious light in the wood, rumoured to be the the ghost of a railroad brakeman.

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

The menacing creature had a tremendous influence on the local culture before being exposed as a hoax.

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

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

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

Built in 1933, this unique ballroom is nicknamed the "floating dance floor."

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

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.

The watery grave of an impractical idea.

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

Elaborate drama imparts an appreciation for 19th century hardships.

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

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

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

143 feet of leaping muskie whose mouth can be used as a wedding venue.

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