21 reactions | City of Rocks is an unique set of rock formations near Deming, New Mexico, caused by a huge volcanic eruption. Paul, Daniel, and Fiana of the Sandia Mountain Natural History Center checked it out on their way to teaching an outreach program to 5th graders in Silver City. It's an amazing place to camp, climb and explore! #newmexiconature | New Mexico Museum of Natural History & Science | Facebook