This indispensable full-color topographic map (1:50,000) of the route of the Inca trail shows the whole Sacred Valley from Cusco to Ollantaytambo and Machu Picchu in splendid detail. It's the best map both for those making the trek from kilometer 88 to the site and for those exploring the region by bus or train. With small inset maps of Cusco, Machu Picchu and Aguas Calientes on the reverse.  (PRU28, $9.95)