What’s in the mounds, craters and pits at American wild horse holding facilities? Posted on August 11, 2016 by Protect Mustangs 47 The public wants to know. Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Photo 9 Special thanks to M and JC for the photos. Protect Mustangs is an organization who protects and preserves native and wild horses.