The White Pocket area, in the Vermillion Cliffs Wilderness on the Utah-Arizona border is an isolated outcrop of Navajo Sandstone in a sea of pinyon-juniper forest. It's at the end of 10+ miles of 4WD jeep track, so it's pretty tough to get to. But it's well worth the effort. Once you're there the formations are all easily accessible and you can literally spend days searching out all the compositions that the area offers. This is one place you'll want to car camp, so bring enough food and water for an extended stay. One sunset-sunrise sequence will not be enough.
From the ebook: You Can't Be Everywhere At Sunrise