Fodor's Expert Review Williams Ranch Road

Although this adventure isn't for the faint of heart—a high-clearance, four-wheel-drive vehicle is required—this rough but enjoyable 7¼-mile, one-way drive over what was once the Butterfield Overland Mail Stage Line passes by dramatic limestone cliffs and offers panoramic views. Access is from U.S. 62/180 at the park's southeast border, and you must get a key at the visitor center to unlock the gate. It takes about an hour to reach the old ranch house, at the base of a 3,000-foot cliff. This is a day-trip only; overnight parking is prohibited.