Southwestern Gems: Our Desert National Parks is a stunning showcase of America’s national parks, monuments, preserves and historic sites of the four major North American deserts: The Great Basin Desert of Nevada and Utah, the Mohave Desert of California, the Sonoran Desert of Arizona and the Chihuahuan Desert of New Mexico and Texas. Premieres Wednesday, September 23 at 8pm with encore broadcast Sunday, September 27th 7pm, followed by the premiere of The National Parks: America’s Best Idea at 8pm.