The site of Maras are salt flats - incredible to see - They are almost like the rice paddies of South East Asia but instead if rice, it's salt - and it's breathtaking. The site was used by the Incan peoples for salt cultivation and gathering and still in use today. The salt flats are within the Andes and thus have breathtaking views. Depending on the time of year, the viewing of the flats can be even more spectacular with an even higher concentration of salts. I find that summer and autumn are the best time to go in regard to the flats. There are 2 other ways to get to these sites other than by car, one is via tour bus - there are tours from Cusco, that visit many sites in the Valley including this one. One can also go via foot - a hike - which for myself is a beautiful way to go - you get a work out, travel along an ancient path to get there, and along the way you can see ancient burial grounds - holes in the sides of the mountains surrounding where some Incan peoples would have been buried.
Moray is an archeological site close by to Maras that is built downwards in terraced circles of stone - used for agricultural purposes, so it is said. However, that standing in the middle circle at the bottom of all the terraces brings a real feeling of peace over a person, or at least a heightened sense of energy. Again it is breathtaking to see and climb down into.