Bitter Water) is a silver deposit and defunct mining district in Chile's Atacama Region.
Agua Amarga was discovered in 1811 and its silver was instrumental to finance the Chilean War of Independence.
[1] An enquiry by Ignacy Domeyko tells of 150 individual mines active in Agua Amarga in 1822.
[1][2] Calera, Colorada and Aris are mentioned as the most productive mines of Agua Amarga.
[2] Following Agua Amarga, further prospecting led to the discovery of silver in Arqueros in 1825 and in Chañarcillo in 1832.