Málaga is a port city on southern Spain’s Costa del Sol, known for its high-rise hotels and resorts jutting up from yellow-sand beaches. But looming over that modern skyline are the city’s 2 massive hilltop citadels, the Alcazaba and ruined Gibralfaro, remnants of Moorish rule, along with a soaring Renaissance cathedral, nicknamed La Manquita ("one-armed woman") because one of its towers was curiously left unbuilt.