For a combined celebration of Earth Day and Arbor Day, my son and I went to the Desert Botanical Garden in Phoenix. A number of the cacti were in full bloom the day we went, the butterfly pavilion is open and Dale Chihuly's glass exhibit is in place. It was incredible.
I decided a blog post wouldn't do the photos justice, so I have posted them in a page that allows for a slide show. Follow the link and then click on "Play Slideshow."
Let me know if it gives you any difficulty. Enjoy!