The Volcanic Tablelands near Bishop, California, are a vast, rugged landscape formed over 700,000 years ago by the Long Valley caldera. In this high desert environment, generations of Paiute-Shoshone left behind an extensive collection of carefully chiseled petroglyphs in the rocks. Now a destination for rock climbers, these fragile treasures are protected by the Bureau of Land Management. Photo by Abhilash Itharaju (www.sharetheexperience.org).