We have been in Las Vegas for 2 nights staying at the Paris hotel. If you didn't want to leave the hotel/ casino you wouldn't have to- it's like a little city all by itself - even the ceiling is painted to look like the sky so you don't feel like you are missing the outdoors (I am enjoying the blatant psychology of gambling and people watching!)

Last night we took a walk on the "strip" and saw the Bellagio fountains- which I thought were fascinating