Somewhere I read that Saguaro don't even branch until they are 50-70 years old. These guys must be pretty ancient. They were on the approach road to the Phoenix Botanical Gardens.
Very nice! Ya know, I never really seen a real cactus in real life (other than in pots or parking lots). I do remember a Darwin Award story about a guy who got drunk and shot a cactus, which proceeded to fall over and kill him. No idea if its true or possible, but I always loved the karmicness of it