when getting to "The Wave" formations, hike to the east then south to a gap to get onto Top Rock. The alcove is on the north end of Top Rock.
the biggest challenge by far is getting a day permit into North Coyote Buttes. Once you have this, explore as much as you can, as there's much more than just "The Wave" in the area!
Just south of, and towering over, "The Wave" formations is Top Rock. On here is an alcove being carved out by sand, creating these most unusual creations of patterns and colors.