Monasterio de la Cartuja, Granada

You'll not find a more lavish baroque interior in the whole of Spain. The church belonging to this Carthusian monastery, abounds with colored marble, jasper and porphyry. It also displays paintings by Juan Sánchez de Cotán. It stands on a hill on the northern outskirts of town and offers excellent views. The building was started in 1516 and finished 300 years later. It's now surrounded by a modern university campus.