Cusco's main bus terminal is at the Terminal Terrestre in Santiago, not far from the airport. The best company running from Cusco is Cruz del Sur (www.cruzdelsur.com.pe), which has its own terminal on Avenida Industrial in Bancopata. Bus travel between Cusco and the Sacred Valley is cheap, frequent . . . and sometimes accident-prone; taxis (shared or private) are by far the better option.