This is Valle de los Caidos, the church/"memorial" that Franco (the fascist dictator) supposedly built in honor of those who died in the Spanish civil war... actually it appears that he built it more as his own tomb. He and the other biggest leader of fascism, Jose Antonio, are buried in this creepy bulding which has now windows and is kind of like a giant masoleum. As you walk along the dark hallways to their tombs, angels with swords loom over you. CREEPY.