Castell de Montjuic
Built atop the ancient Jewish cemetery (hence the name "Montjuic"), which means "Mount of the Jews". In the 20th century, Franco made the Castell de Montjuic one of his "interrogation" headquarters; somewhere deep in the recesses of the structure, his beneméritos ("honorable ones," a.k.a. the militia) are believed to have shot Catalunya's former president, Lluís Companys, in 1941.