Gassan Diamonds, a family-owned diamond cutting and trading company, offers free tours seven days a week in 27 languages. Tour guides share information about the diamond cutting process, as well as help you discover more about the four C's: carats, colors, clarity and cuts. You even have the chance to watch these diamond craftsmen at work. After the tour, take a peek at the sparkling jewelry on display in The Boutique. You'll find brands such as Jaeger-LeCoultre, IWC, Omega, Rado, Longines and Tissot. Maybe you'll even find something for your special someone. It is free to look around, but you'll have to pay if you want to make a purchase (sorry to break the news).