Nowadays when people think Wisconsin Dells, they probably think water parks. However, this part of southern Wisconsin is home to a number of beautiful sandstone cliffs. One particular slot canyon, known as the Witches Gulch, is almost otherworldly. The sandstone in this area formed millions of years ago, back when this region was the bed of an ancient lake. As the landscape changed over time, the lake bed was exposed to the elements. Wind and water carved out a meandering path through the sandstone that today takes the form of…