hey, so I happen to be by the Sierra Hotel today and remembered your question re the pond. It really is right across the street and there is a lil walkway bridge and stuff you can take pics on. The only thing is I'd probably just double check with the Sheraton if its ok to take pics there since technically I think it is their property. If you REALLY wanted water front pictures...there is a lake 5 minutes from the hotel that you could go to.