Buena Vista, Carolina, Puerto RicoBuena Vista is a barrio in the municipality of Carolina, Puerto Rico. Its population in 2010 was 29,303.HistoryBuena Vista was in Spain's gazetteers until Puerto Rico was ceded by Spain in the aftermath of the Spanish–American War under the terms of the Treaty of Paris of 1898 and became an unincorporated territory of the United States. In 1899, the United States Department of War conducted a census of Puerto Rico finding that the population of Hoyo Mulas was 1245. The barrio's name was Hoyo Mulas until a name change was legislated, prior to the 2010 census.