Buses to the Sacred Valley are popular and cheap – though terminals are tricky to find (ask around), buses depart when full, and speed limits don’t exist. Still, buses are generally safe. Look for stations at Av. Grau 525, with service to Urubamba, and Calle Puputi 208, with service via Pisac to Urubamba. For buses enroute to Ollantaytambo, take a ride to Urubamba and transfer onward from there.