Stephen White, a junior at Northeastern University, recently wrapped up an internship through the school’s co-op program at DNA Architectos, an architectural office in Barcelona. In high school he had lived for a time in Salamanca, a small town near Seville. He chose to return to Spain for “the total experience,’’ namely the culture, food, new friends, and the opportunity ... Spain - Barcelona - Northeastern University - Salamanca - Seville...