This valley is framed by the north face of Aconcagua and by the eastern face of Cerro Mercedario. It is located along the banks of the rivers Los Patos and Castaño. The landscape is amazing. The night sky in Calingasta is so clear and beautiful that you can enjoy the stars every night. In addition to this memorable experience, you can visit the astronomical observatories located in the national park El Leoncito.