Granada is supposed to be the oldest colonial city in the Americas. I assume that means continously populated. It is very easy to photograph. Primarily because it feels relatively safe compared to other locations I've been to in Central America. It's a tourist town and perhaps the residents realize they have to put up with foreign photographers. I was able to walk the market without much fear of being assaulted and left my camera outside of my bag, where I kept it hidden in more dangerous settings. Granada feels quite similar to Antigua in Guatemala and also to San Cristobal de las Casas in Chiapas, Mexico. All three are famous tourist towns.