One of Dinosaur National Monument's easiest rock-art stops combines Fremont petroglyphs and pictographs only a short walk from the road. Federal protection rules prohibit touching, tracing or rubbing the images.
Filed under weird history: real events too strange to have made the textbook.
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Source: nps.gov/dino/learn/historyculture/viewing-petroglyphs-and-pictographs.htm