Havasu Falls with travertine formations in the river creating spillways, and Fremont cottonwood trees (Populus fremontii), dawn, Havasupai Reservation, Arizona, USA  ,  BLUE,DAWN,DICOTYLEDONS,LANDSCAPES,NORTH AMERICA,PLANTS,POPLAR,RIVERS,ROCK FORMATIONS,ROCKS,SALICACEAE,TREES,USA,WATER,WATERFALLS  ,  Jack Dykinga