Travel into Spain's Moorish and Christian history with every step you take in compact, walkable Granada. The famous Alhambra fortress is a required visit, as are the Alcaiceria (marketplace), the Cathedral and too many architectural sites to name. Wander through Granada's fascinating Moorish old quarter, the labyrinthine Albaicin; then plan to head out again by night, because the nightlife here is particularly lively.