Montjuic is a prominent hill overlooking the Barcelona harbour. For ages, it played a strategic part in the defense of the city and itâ€™s one of the cityâ€™s natural elevations. Nowadays, the area is a touristic magnet for Barcelona.
MontjuÃ¯c, located on the hill overlooking the harbor, covers more than 500 acres, making it the largest park in all of Spain.
Source: https://barcelonando.com/montjuic-olympic-ring, http://www.travelingwiththejones.com/2015/10/01/32-fun-facts-about-barcelona-spain/