Traveling from west to east, you climb slowly as you straddle Yellowstone Caldera—a 30-mi-by-45-mi crater formed by a volcanic eruption. Pull over to see the Gibbon River as it tumbles into the caldera at 84-foot Gibbon Falls. You also pass several roadside geothermal features (stop at Monument Geyser and Artists Paintpots) before you arrive at Norris Geyser Basin.
Grand Loop Rd. from Madison to Norris, Yellowstone National Park, Wyoming, United States