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.

One of Frank Lloyd Wright's final works was this UFO church.

The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

Every winter, dozens of otherworldly ice structures sprout up from a rigged up artesian well.

Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

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

A roadside spring pooling in an old bathtub where anyone can stop and sip.

The secluded resting place of a local historical figure who perished during the sinking of the Titanic.

Walk up a ramp through a forest for panoramic views of Lake Michigan.

As the glaciers retreated out of northern Wisconsin, this unique natural wonder was crafted.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

The preserved remains of the former Milwaukee County Hospital for the Insane are hidden in the wooded grounds of County Park.