According to its website, Petrified Forest National Park in northeastern Arizona is actually two distinct parks: the Painted Desert shown in the photos below, and the Petrified Forest in the next section. The park contains one of the world's largest and most colorful concentrations of petrified wood, as well as rainbow hued badlands full of archeological sites and displays of 225 million-year-old fossils. The park covers over 93,533 acres and consists of six separate "forests" that took over 200 million years to form.