Fodor's Expert Review Mariposa Grove of Giant Sequoias

Of Yosemite's three sequoia groves—the others being Merced and Tuolumne, both near Crane Flat and Hetch Hetchy well to the north—Mariposa is by far the largest and easiest to walk around. Grizzly Giant, whose base measures 96 feet around, has been estimated to be one of the world's largest. Perhaps more astoundingly, it's about 1,800 years old. Park at the grove's welcome plaza, and ride the free shuttle (required most of the year). Summer weekends are crowded.