Each day there are about 2500 visitors to Machu Picchu but only 400 are allowed to climb Wayna Picchu. Reservations must be booked in advance to be one of the 400 people to climb up the steep mountain. At the control point again you need your passport, your reservation and you must sign into the book and the time you're entering. When you leave, you must find your name and sign out with the time.
At the entrance to Wayna Picchu was a list of instructions. My favorite is 'Be healthy and fit for the ride', like it's a ride as Disneyland with physical activity and 'walk with careful'.
It was certainly steep but well worth the views. From the top was yet another view of Machu Picchu and the zig zag road the buses took to the top.
While hiking around we came across another trail blocked by an employee. It was closed because the loop required 2.5 hours and there wasn't enough time. When another couple negotiated their way onto the closed trail, we jumped in too explaining we were fast. The trail let to Gran Caverna and the Temple of the Moon. Gran Caverna are natural caves on the north side of the mountain and are well below the summit. We climbed a ladder down in one spot and slide down the steep downhill slopes. We knew what goes down must go up and we'd have to climb our way back up and if it took 2.5 hours John thought we'd be short on time. We were going to walk down the stairs from Machu Picchu back to Aqua Caliente leaving by 3pm in order to catch our train that boarded about 5:30pm.