The most important ecotourism attractions (fig 2) are: the geysers (Old Faithful, Norris Geyser Basin, Fountain Paint Pot, Firehouse Lake Drive, West Thumb Geyser Basin, Mud Volcano), the hot springs (Mammoth Hot Springs), Yellowstone Lake, the canyon and waterfalls of the Yellowstone river, the wildlife (grizzly bears, black bears, wolves, mountain lions, elks, bisons, mooses, pronghorns, bald eagles), and the historical sites.