Tourists in Las Vegas can see how chocolate is made and then step outside to tour a special garden of desert plants. It's an odd combination of attractions - but don't forget this is Las Vegas where anything goes. Firstly, visit the Ethel M Chocolate Factory to watch the fascinating way chocolate is mass-produced – you'll see tanks holding 35,000 gallons of chocolate. Of course there's a chance to buy as much as you want in the shop alongside. Then step out into the three-acre garden and stroll among more than 300 types of cactus that thrive in the desert conditions here.