Besides rainbow mountain, another easy day trip that we took from Cusco city was to the Moray archaeological site and the Maras salt mines. Both very interesting and definitely worth a visit.
Apart from the obvious main attractions of the Inca ruins that surround the city, Cusco has a lot more to offer. As we had 10 days there, we took several day trips before visiting the main star, Machu Picchu.
This was our day trip to the rainbow mountains of Cusco.