Girls, then wear a casual little coat and short dress with cropped trousers and jeans, sports shoes or flat shoes, so that you won't be tired when walking. Carry a backpack, full of youthful vitality, casual and chic, and the clothes should be beautiful and colorful, because you want to take pictures. Also bring some snacks, European.
The food is poor, you can eat well, but you can't eat well. Just prepare some snacks yourself. You can't bring fruit into the customs. It is best to buy things in Europe.
Credit cards are convenient and safe. .