TWIN TANKS PHOTO GALLERY. This is a very unique Petroglyph site as it's not on a Ridge or Butte. Near 2 adjacent tanks is a small pile of large rocks with these few images on them. I'd guess I'm the only person, other than the Ranchers who used to run this place, that has seen this site. Because the rain had soaked a wash I needed to cross to get to the Site I was working on, I hiked to East Tank, which is how I found the tanks and this site. Click on the first thumbnail to see larger image. Use controls at bottom of each large image to start slide show or go through manually or with arrow keys.