I spent my 13th Birthday in the Upper Geyser Basin/Old Faithful area!  We got front row seats to see Old Faithful, then went on a two hour walk to see many other geysers.  The one in the picture is Riverside Geyser, which erupted for a full 20 minutes!  We also got a tour of the historic Old Faithful Inn.  There is actually a treehouse built into the inside of the Inn lobby.  They have fantastic cookies and cream ice cream with HUGE chunks of Oreo!