if you hit Barcelona, make sure to hop on the tour bus, there is 2 tour buses that will show you all of Barcelona within 2 days. doing it all in one day will kill you. watch your back in las ramblas there is always peeps posted up looking for tourist to jack as well as in the subway. other wise than that the city is beautiful and you should have a good time. depending on your bank exchange your monies to euros here in the states or in the airport when you land. hitting the banks in spain they will jack you in the exchange, be ready to drop coin its mad expensive over there. if you plan to hit any clubs be aware that they dont start popping off till 1am /2am and go all the way till 7/8am. also when are you going? i have fam in Barcelona that can show you a good time.