Sent Via postcrossing to IrinkaLaponka, This user wanted watercolors. I don't really have any watercolors. So on my road trip I kept my eye open. Well. Let me tell you the National Park Service doesn't carry a lot of watercolor postcards either. So when I saw this one I thought it was a painting at first. But its actually lichen growing on a tree burned by volcanic activity. I got it at Craters of the Moon NP. I passport stamped it from the day of my visit.