Yosemite Valley holds an unusually concentrated abundance of spectacular waterfalls. In spring, torrents of melted snow thunder over Yosemite's precipices, but by August the ephemeral falls disappear and others, including the Cascades, dwindle to a mere trickle. Ahwahneechee legend warns of the danger of approaching too near a waterfall, and the story of Po-ho-no, or Bridalveil Fall, tells of an Indian woman who fell into the creek and was swept over the waterfall, never to be seen again; since then, Po-ho-no has been dreaded as the home of a powerful spirit.