Men + Mules + Water + Power has multiple hidden objects. Here is the list:

1. pick-axe
2. fish
3. 2 heart-shaped rocks
4. 1904
5. a real rock
6. a real mule-shoe
7. 6 varieties of wildflowers – Sierra Columbine, Indian Paintbrush, phlox, Hoope’s Sneezeweed, Golden-beard Penstemmon, Wild Blue Flax.

Here is a little piece of the mural for you to study and identify a few of the objects: