Europound

Europound is a dedicated currency exchange house (casa de cambios) with a solid reputation for competitive exchange rates across a wide range of currencies, including euros, dollars, and Mexican pesos. Unlike a standard bank ATM, this is a specialist operation — meaning you're likely to get a better deal on your conversion than at a generic high-street bank. They're reachable by phone seven days a week and have multiple offices spread across Spain, so if you need to sort out your currency situation, this is a solid first call.