The Bellagio Conservatory & Botanical Garden are a must see while in Vegas! I've visited Vegas numerous times, but last November was the first visit to the Conservatory and it was truly amazing! In November it was of course decorated with fall foliage then when I visited in December it had been transformed into a winter wonderland. During our recent trip in May I initially visited on a Saturday and there were beautiful tulips everywhere - returned on the Friday with friends and the tulips had been replaced with all new blooming summer flowers. It's truly exquisite - I will visit each time I'm in Vegas!