immigrants from the Mediterranean islands Corsica and Majorca. Some of them established coffee plantations. During the last decades of the 19th Century, the coffee produced in Adjuntas was exported to Europe, United States and even the Vatican.Adjuntas was proclaimed a "villa", or a first order municipality, by the Spanish Government Monarchy in 1894. Several years after, the town was occupied by the United States Army forces during the Spanish American War of 1898 and was visited by President Theodore Roosevelt in 1906.
The discovery of rich deposits of copper, gold and other minerals during the 1960s motivated some local community and environmental leaders to oppose the mining. By the 1990s, they convinced the Puerto Rican government to take a stand against the mining industry, on behalf of conservation. Today, instead of mining, with the leadership of Casa Pueblo, a community organization, Adjuntas leads the preservation of natural resources movement in Puerto Rico
