Um hello...its the Bellagio Conservatory! It changes every month and is beautiful!
I have been here in January and seen the Chinese New Year display and then in March to see the garden/bugs display. Its a great photo ops and oh-so-pretty.
Also, you can't miss that Chihuly glass ceiling!
As I said in a review of the fountains, there might be new hotels cropping up everywhere but the Bellagio just always holds some classics!