No, this isn't a garden in Tucson; it's in the Portland, Oregon metro area. Mark Burgess has created a beautiful garden which includes many cacti and succulents which many would assume couldn't survive outside in our climate: Agave 'Green Goblet', Echinocereus rigidissimus subsp. rubispinus and E. rigidissimus albispina to name a few. Plus, of course, a wide variety of chollas and other opuntias. Good job, Mark!