Piasa

The Piasa (PY-ə-saw) or Piasa Bird (aka Paillissa, Piesa) is a creature from Native American mythology depicted in one of two murals painted by Native Americans on cliffsides above the Mississippi River. Its original location was at the end of a chain of limestone bluffs in Madison County, Illinois, at present-day Alton, Illinois. The original Piasa petrograph no longer exists; a newer 20th-century version, based partly on 19th-century sketches and lithographs, has been placed on a bluff in Alton, Illinois, several hundred yards upstream from its origin. The limestone rock quality is unsuited for holding an image, and the painting must be regularly restored. The original site of the painting was on lithographic limestone, which was quarried away in the late 1870s by the Mississippi Lime Company.

Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).