Take the truck on the old road to the old Mariscal 'Quick Silver' mine, but only if road is dry. Ask the Ranger for maps.
That is good advice, I actually did get an opportunity to spend a couple of hours exploring around the mine. I had to wonder how many miners suffered long term health problems from handling the quicksilver (mercury).
"Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover."