High Quality Content by WIKIPEDIA articles! Sachaca District is one of twenty-nine districts of the province Arequipa in Peru. Arequipa is a province in the Arequipa Region, Peru. It is the most populous province of the region, and its capital, Arequipa, is Peru's second-largest city. It borders the provinces of Islay, Camaná, Caylloma, and the Cusco and Puno regions. A province is a territorial unit, almost always an administrative division, within a country or state.