The adventures of John and Vicki, Fulltimers.
Have you been to Tonto Natural Bridge State Park? It's about 87 miles north from Apache Wells on AZ-87.
Yes, twice. Pretty cool. Don't have any pictures."It is believed to be the largest natural travertine bridge in the world. The bridge stands 183 feet high over a 400-foot long tunnel that measures 150 feet at its widest point."http://azstateparks.com/Parks/TONA/