Filmmaker Tristan Greszko takes us on an aerial journey through the isolated White Pocket of Vermilion Cliffs National Monument By Dana Coen smithsonian.com Located next door to theĀ Grand Canyon, Vermilion Cliffs National Monument is, arguably, one of our nation’s most underappreciated natural marvels. Unlike theĀ tourist-friendly Grand Canyon, which receives an average of 4.6 million visitors […]