The petroglyph panels at what's become known as Petroglyph Beach are one of the accessible remnants of the pre-dam human history of Glen Canyon. The carvings include sheep, geometric patterns, and human figures, and can be reached from the water by boat or, when lake levels allow, by walking along the shoreline.
The Bureau of Reclamation and the Navajo Nation have documented and mapped as many petroglyph sites as possible in the Lake Powell area, but the ongoing drought and fluctuating water levels mean that submerged sites periodically emerge and then disappear again. It's a sobering reminder of what the reservoir covered.