The last city to fall to the Christians, Granada’s outstanding monument is the Alhambra, the palace-fortress built by the Nasrid rulers in the 13th to 14th centuries. The most popular tourist attraction in Spain, tickets must be booked at least 24 hours in advance. The highlights include: the Palacios Nazariés, its halls, courtyards and loggias decorated with painted enamel tiles, delicately fretted arches, stalactite vaulting, marble sculptures and stucco ornament; the Alcazába, an 11th-century hilltop fortress and the Generalife, the gardens of the summer palace. Across the river from the Alhambra is the atmospheric Arab quarter of the Albaicín. The main sights here are the Arab baths, the Renaissance Casa de Castril and the Church of San Nicolás from where the views of the Alhambra and the surrounding countryside are outstanding. In the town itself, visitors should not miss the Gothic Capilla Real (Royal Chapel) built by Ferdinand and Isabella as a mausoleum and a symbol of their triumph over the Moors. The adjoining cathedral, built over several centuries, is impressive mainly in its proportions.