Complex sentence: Parfrey's Glen, located within Devil's Lake State Park is a Wisconsin Department of Natural Resources-designated State Natural Area is a deep gorge cut through the sandstone of the south flank of the Baraboo Hills.
Split into simpler sentences: Parfrey's Glen, located within Devil's Lake State Park, is a Wisconsin Department of Natural Resources-designated State Natural Area. The glen is a deep gorge cut through the sandstone of the south flank of the Baraboo Hills.