Good place to exchange your USD $ to Euros €. Note however, there is a significant fees that goes with it. We only exchanged enough cash as needed for taxi, buying water and fruits. So limit your cash spending for those needs only. Otherwise, I suggest use your credit cards at all time. You will save money on fees. Be mindful of any international credit card fees, and I don't recommend American Express as most merchants in Barcelona charges you, using AX. Use your Visa/MC instead. I used my Apple Card with zero international fees. I was a happy camper. I hope this helps out.
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