If you don’t plan on walking up to Machu Picchu (about an hour up the road from Aguas Calientes), you will have to catch a bus, easily identifiable by the Consettur name on the front. Consettur buses depart from the intersection of Imperio de los Incas Avenue and the Aguas Calientes River. Tickets cost $10 USD one-way or $19 USD round-trip, and can be purchased in advance from the small kiosk across the street from the departure point. Buses leave every 10 minutes starting at 5:30 am. The park is open from 6 am to 5:30 pm. During peak season, lines for the first bus can get long, so it's recommended that you arrive by 5 am or earlier. If you’re heading back to Cusco, take the bus back down at least an hour before your train departs.