There’s something magical about stumbling on a lush oasis tucked away in the middle of Arizona’s wild terrain, especially when that oasis includes the world’s largest natural travertine bridge. Just two hours from Phoenix, Tonto Natural Bridge State Park in Payson is is home to one of Arizona’s most treasured spots.  Our kids absolutely love it here. It’s one of those family-friendly adventures where they can scramble over rocks, splash in shallow water, and let their imaginations run wild while we soak up the views.