Ancash

One of the things I remember most, is the Llanganuco Lake; It is in the middle of the mountains, south of Huaraz.. walk to the other end of the lake (opposite from where all the buses and people are) and there will be a peace and quite that you can feel you are one with the lake.. and the color of the water is awesome, kind of like turqoise or something like that. Well worth the trip.