| Lobby > 
              Exhibits > Why 
              Geysers Erupt > Geyser 
              Ingredients > Heat > Norris Geyser 
            Basin Norris Geyser Basin 
 Many scientists consider Norris Geyser Basin to be the hottest 
              and most changeable place in Yellowstone, possibly because it sits 
              at the junction of three separate fault zones.
             Next | 
              1 > 2 
             > 3 
            > 4 
   |