@Bellagio | Free - Open 24/7 | Most hotels have gardeners, but the Bellagio has 120 of them. That's not including the designers & engineers to make all this magic happen. 

From bellagio.mgmresorts.com

Bellagio’s Arcadia

Each season, the enormously talented horticulturalists and designers who make up the Bellagio Conservatory team transform this 14,000-square-foot floral playground into a showcase of the distinctive sights and colors of spring, summer, fall and winter—along with a special display for Chinese New Year. When the seasons turn and the displays rotate, 90 percent of the trees, flowers and plants in the conservatory are recycled, to further celebrate our commitment to the earth.