We found this object visiting Majorca this summer and thought it would make a perfect cache container. Just had to figure out how to make it open and close, then find a good hiding spot. What better spot than Back Bay, with the scenic views and beautiful trails. A short walk from the parking lot trailhead, the cache is hidden just off the main trail, but via a little side path that prevents you from having to trample new growth. If you want to know what you're looking for, read the hint.