After climbing back down Wayna Picchu and taking another walk through Machu Picchu, Liz, Michael, and I (the only ones from our group who did the former) headed for the bus that would take us to Aguas Calientes.
There was literally a bus that ran every five minutes, swallowing up tourists like they were candy. After 20 minutes of winding roads down to the valley, we hopped off at Aguas Calientes.