I went to Peru in September 2007 mainly in order to visit Machu Picchu, which by the way means Old Mountain in Quechua, the language spoken by the Incas. This place is amazing in many aspects, specially by how the rocks were piled up making the walls. The Incas could not write, so there is no written record of their achievements. Machu Picchu was a sacred place, there were no bathrooms there in the past, neither now.
You can't fit a single piece of paper between these stones
The twelve-angle stone - Cuzco
Shuttle bus that links Aguas Calientes to Machu Picchu