Geology in Wisconsin

These modest Midwestern formations are kin to Niagara Falls' impressive cliffs, more than 600 miles away.

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

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

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

This punny mirror of another Wisconsin attraction is exactly what it sounds like.

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

This cave holds a surprisingly colorful variety of geological oddities.