Oh the Fountains of Bellagio!
Amidst all the hustle on The Strip, I could actually watch this for hours. The magnitude and size of the show is complex, and so elegant. A very well synchronized show. The music that is paired with the water show is mostly classical. Imagine classic Vegas: Sinatra! A few modern pieces as well. Best of all the show is free and located center Strip along the boulevard under the tree lined Bellagio sidewalk. You can also visit the Strip facing restaurants for dinner and a show. Great view from Eiffel Tower Restaurant as well.
Do yourself a favor and skip the Sirens show at TI. But do stop to watch the Volcano at the Mirage before watching this awesomeness!