It’s hard to believe Fashion Show has been a Las Vegas Strip fixture since 1981. In an age when most malls are battling obsolescence, Fashion Show feels so modern that it could have opened yesterday. And yet, there are two things about this place that have remained constant for close to 40 years: You’re likely to catch a runway show, and there’s something in this mall’s charged, vital air that will make you wanna shop. 3200 Las Vegas Blvd. S., 702-784-7000.

Runner-up: The Forum Shops at Caesars Palace.