The Painted Hills are one part (or “unit”) of a three-part Oregon national monument: The John Day Fossil Beds, located in Eastern Oregon. They’re all pretty cool, but I think this is my favorite. Over millions of years, ancient Oregon volcanoes spewed ash that fell, then transformed into these breathtaking mounds of crimson, gold, and ebony claystone (bentonite). Lacy fossil leaves and metasequoia needles were found here — evidence of a once-damp, rainforest-like climate almost impossible to imagine today. Smart travelers pack a camera — during spring, otherworldly parfait-like layers of color brighten after a rainstorm, and more than 22 varieties of vibrant flowers blossom in the hills and valleys. In…