I do carry a wallet when on foreign travel. But if your wallet is like mine, it has all kinds of cards, coupons, and memberships stored in it. Most of these are not needed or valid when you travel out of the US. If you will not be driving you may not want to carry your drivers license as you will have your passport for needed ID. I have a small folding wallet that can carry a few necessary cards and has a nice money clip for cash. This way you can keep the unnecessary cards, etc. at home in case something gets lost. Just take what you need. TIP: Bring a photo copy of all the cards you did bring in case of theft. This should include a copy of your passport. Include the back sides of credit cards as they provide phone numbers to call just in case. It might be a good idea to give a copy to someone at home too. Keep a “spare” credit card in your hotel safe along with your passport, as insurance against theft.