Pilawit'u
 Pilawit'u is a Bolivian lake located in Vacas Municipality Arani Province Cochabamba Department. The last four thousand years of environmental and vegetation change has been recently reconstructed from the lake sediments of Pilawit'u (Lake Challacaba)The main tributaries of Pilawit'u are Chiwalaki Challa Q'awa Muña Mayu and Phaqcha Pata Mayu whose tributaries are T'utura Mayu Phaqcha Pata and the Phaqcha River. Its surface area is 2.0 km2 (0.77 sq mi).