San Blas. Go in the early morning; at this time of year the light is softer than it is in the afternoon.
A very cool thing happened to me there once. I was there before dawn, waiting for the light, and got a little spooked. Then, out of nowhere, this very old friendly dog came and stood right next to me. When I set up the tripod, he parked between the legs. Just stayed with me. Then After I had made the last photograph, he just got up and walked away. Like he knew I was spooked, knew I needed the companionship, and knew the moment I was done, before I had even started to break down the equipment.
The mission is run by Franciscans, VERY nice people. You will love it.