Native Americans noticed fossil tracks in their environment and had explanations for them involving mythological creatures. Examples show pictographs and petroglyphs that seem to reproduce fossil tracks, proving they had observed them. At Cub Creek in Dinosaur National Monument, a panel of large lizard petroglyphs is located near a fossil track site. The petroglyphs are proportioned to represent creatures around 30 feet long, correlating with the size of dinosaurs that left tracks at the nearby site. This suggests the giant lizards depicted were inspired by observing fossil tracks in the area.