The Dubai Mall
It may have it's own Metro Station, but expect to be walking for around 15 minutes before you finally make it into the biggest shopping Mall in the world if coming via public transportation. Once at The Dubai Mall here you'll have access to almost every shop you can think of, maybe even two stores per brand if you're lucky. Complete with many restaurants and entertainment facilities, nearby is also the planet's tallest building, the Burj Khalifa, and The Dubai Fountain for you to enjoy playing tourist in between bursts of retail therapy.
Best for: Entertaining guests who are in town.