This is one thing that is definitely worth seeing when you are in Vegas, especially since it is FREE! :) My hubby and I always have to come see the Fountains of the Bellagio whenever we are in Vegas. It's really beautiful to watch the waters dance to the different songs. Is is breath taking to watch and leaves you mesmerized.
Shows are every 15 minutes and I believe end at midnight. During the holidays, they have different music they play, which is really great. :)
Now, if The Bellagio can only take their dancing waters show up a notch or two by taking pointers from Disney's "World of Color" show then this would be even more amazing to see!!!!