Machu Picchu: is open from 7am to 5pm daily. It's also possible to organise a nocturnal tour between 6pm and 1am through several agencies in Aguas Calientes. In case you would like to hike up to Wayna Picchu (from the top of which there is an incredible view towards Machu Picchu itself), you have to get up early. The guard at the beginning of the path will only let you in until 1 pm. Regardless of the opening time of the guarding hut only 400 visitors are allowed to hike to Wayna Picchu per day.