The emotional heart of the Alhambra and arguably the finest surviving example of Islamic architecture in Europe. Built by Muhammad V in the 14th century, the courtyard is ringed by 124 slender marble columns supporting muqarnas arches of breathtaking intricacy. At the center, twelve marble lions carry a basin from which water channels flow in four directions, representing the rivers of paradise. The surrounding halls — Abencerrajes, Two Sisters, Kings — each contain ceiling work so elaborate it defies description. It is included with the standard Alhambra Nasrid Palaces ticket, which you should book weeks in advance. Arrive early or late to experience it without the crush of tour groups.