Everytime when I come to Vegas... Bellagio Hotel is a MUST visit for me. Because I love to check out the gorgeous Bellagio Conservatory & Botanical Gardens! Beautiful fresh flowers and the creations by those florists are so creative.
I like to come during holiday seasons because it is super festive here!! Since it is a very popular tourist spot, taking pictures there could be a challenge because super crowded. My suggestion will be wake up a little bit earlier, in the morning definitely way less people and you can take nicer pictures without people standing next to you.