Staring October 1st! The Dallas Arboretum is known for its incredible display gardens and festivals. Years of pushing the bar ever higher increases the challenge of developing a theme that will interest and excite garden guests. We relish this challenge. When we hit on The Wizard of Oz, we knew we had a unique opportunity to not just impress our guests, but to transport them into another world and for our adult guests, to take them back in time to their first experiences in Oz.