Mértola is one of the capitals of the Alentejo. Its history is forever linked to the Guadiana river, strategic waterway for the development of trade routes of the Mediterranean.
Mértola is a tipical Portuguese village raiana the district of Beja, Alentejo region and sub-region of Alentejo, with more than 2000 inhabitants.
The village is situated on a hill on the right bank of the Guadiana River, just upstream of the confluence the Oeiras river.
It is home to one of the largest municipality of Portugal, with 1 292.87 km² of area.
The municipality is bordered to the north by the municipalities of Beja and Serpa, the east Spain, south and west by Alcoutim by Almodovar and Castro Verde.
The Mértola village is known by the São Domingos mine.