The cordillera south of Mendoza city contains two remote and little visited but stunning provincial parks – the fabulous Parque Provincial Tupungato, 80km southwest from Mendoza and dominated by the soaring volcano of the same name, and the Reserva Provincial Laguna Diamante, with a turquoise altiplanic lake, the Laguna Diamante, at its heart. The latter is a further 140km southwest of Tupungato and only open during the summer; both are well worth the effort it takes to reach them.