Dude, I posted a map for you on the last page, Did you even look at it? Each hotel is on a huge lot and you don't just walk in through the front entrance off the street. There are a ton of overpasses, escalators, pathways and breezeways to navigate through. It's not going to take 10-15 minutes to walk from the Riv to the Bellagio, if that's what you're thinking.
Here, Google is your friend:
http://cheaplasvegas.cc/distance_fro...a_to_bellagio/