The Bellagio website at Bellagio.com puts it best:
Just beyond Bellagio's gracious lobby lies the Conservatory & Botanical Gardens, a kaleidoscope for your senses. You'll want to take a moment to appreciate the intricate detail blooming before your very eyes. Submerge your soul in this magnificent garden abounding in fragrance, texture and color. Row upon row of exotic plants and flowers weave a glorious tapestry displaying the unique highlights of every season and holiday. There's no more inviting location for a photo opportunity. Take advantage of this unique setting and create a moment to cherish for years to come.

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