At the Wind Caves in Anza-Borrego Desert State Park.
I shot this just before the moon set - the moonlight did a nice job of lighting up the rocks without washing out the Milky Way.
This is a single frame from a time lapse sequence. I lit the "eyes" up with an orange glow stick. Unfortunately I covered a bit too much of the glow stick in sand - worrying that it would be too bright - only to have to die out just as the moon set.
Lugging a bunch of camera gear, it was a steep mile-long hike to get here. I ended up suffering a bit of heat exhaustion, but was able to recover a while later. I need to remember to drink more water
"On the eastern edge of Anza-Borrego Desert State Park lies Split Mountain, the Carrizo Badlands, and a feature known as the Wind Caves. Here, the exposed sandstone of the marine beds from the five-million-year-old Imperial Formation have been slowly eroded by wind into fantastic shapes that evoke whimsical images of boats with portholes, spaceships, and even the fictional town of Bedrock, hometown of the prehistoric Flintstone family."