Guama

Guamá lies in the uplands of western Puerto Rico, in the country of San Germán. The Caín River rises from springs in the Guamá and Caín Alto hills, then flows west to join the Oconuco. These streams eventually join the Guanajibo, which reaches the island's western coast. In the early nineteenth century Guamá was already recorded among the districts of San Germán, whose valleys and hills were crossed by this network of rivers.

The later city of Mayagüez lies here.