Tonto Natural Bridge State Park 
Hwy 87
Payson, AZ 85547
928-476-4202
http://azstateparks.com/Parks/TONA/index.html
State Park: Birding, Hike, Picnic, Walk
Tucked away in a tiny valley surrounded by a forest of pine trees, Tonto Natural Bridge has been in the making for thousands of years. It is believed to be the largest natural travertine bridge in the world.