Bryce Canyon National Park, 35,835 acres (14,513 hectares), SW Utah; est. 1924. The Pink Cliffs of the Paunsaugunt Plateau, c.2,000 ft (610 m) high, were formed by water, frost, and wind action on alternate strata of softer and harder limestone; the result is colorful and unique erosional forms, including miniature cities, cathedrals, and spires. The Basket Makers were probably the first Native Americans to inhabit the area, and many of their artifacts are exhibited. See National Parks and Monuments (table).