If you loved visiting Amsterdam in your 20s, add Bruges to the list for your 30s. The canal city is small enough to walk around on foot, but do make sure you take a boat ride to enjoy it properly. You can also eat and drink to your heart's content, whether you choose to buy chips and mayo from one of the many stalls lining the town square, or sit down in a laid-back bistro to indulge in mussels and a glass of kriek (cherry) beer. Even if you're not a beer drinker, the brewery tour is worth it for the view from the roof of the building, and there's also a chocolate museum that goes some way to explain why Bruges has a chocolate shop on every corner. Needless to say, you're going to need to bring a few boxes home with you.