Portugal uses the Euro currency and, unlike the rest of Western Europe, cash is still king. Always carry a generous (but not unsafe) amount of cash on you to pay for small items and taxis and to leave a tip at restaurants.
You cannot visit Portugal without trying a pastel de nata, an egg custard pastry with cinnamon and vanilla. Grilled sardines and cod are also delicacies here. In fact, Bacalhau (dried or salted cod) is Portugal’s national dish.