Devil's Den is an outcropping of rock that was very important during the Battle of Gettysburg. We've went touring the battlefield today, and my 11-year-old LLBean boots finally "gave up the ghost" as it were. After climbing around on the rocks, I realized I had no "sole" left to my boots.
When we got back to the hotel, we were making jokes about my boots, and I said "I lost my 'sole' in Devil's Den!" I thought it was pretty Klever with a Kapital K.