Chocolate falls is a hidden treasure in Arizona. It is not 
          promoted for tourism; there is no paved road to the place and no 
          facilities are provided there. The muddy falls, which is inside the 
          Navajo Reservation, is about one-hour driving time away from 
          Flagstaff. It is dry all the time except in March and April. Our 
          exploration encountered many challenges and accidents. First, although 
          I reserved a SUV, it was sold out and as a result the rent car company 
          gave us a mini-van instead. But when the 2-wheel-drive minivan was 
          stuck in sand, it was unable to escape. Fortunately, a good Samaritan 
          who drove a 4X4 pulled us out. Later, I put my tripod mounted with a 
          camera on sand. After felling down due to insufficient support, the 
          camera ceased to working. Nevertheless, I always bring three cameras 
          to any photo trip.