Tonto Natural Bridge — The World's Largest Travertine Arch & the Pine-Strawberry Rim
Ninety minutes northeast of Phoenix the desert climbs abruptly out of the saguaro into cool ponderosa forest at the foot of the Mogollon Rim, and hidden in a lush side canyon is one of Arizona's strangest natural wonders — Tonto Natural Bridge, believed to be the largest natural travertine bridge in the world. A 183-foot-high arch spans a 400-foot tunnel of mineral-stained rock, dripping with ferns and springs, and four scenic viewpoints ring the rim above it before the steep Gowan, Pine Creek, and Waterfall trails drop hikers down into the mossy grotto beneath. The day pairs that descent with the mountain hamlets of Pine and Strawberry just up the highway — pine-shaded villages perched on the Rim where the Highline Trail sets off from the Pine Trailhead into the national forest. It is a compact, vertical, forest-and-water escape from the Valley heat, all within a single day's loop.