Imagine walking back through time in a place where dinosaurs once roamed the Earth. A time of lush green forests with 200 foot tall trees. Over time these trees, swept away by water and covered with volcanic ash and sediment over millions of years, became entombed and petrified. Through gradual erosion, massive logs and remnant pieces became exposed and still remain today.The Petrified Forest is the best location in the USA to see petrified wood, found here in an especially beautiful array of bright colors. The park is open year round except Christmas, December 25.