Source: WTL digitized slide photo© taken on site in Machu Picchu.
Comments: Here is a close-up of one of the most famous parts of the stone walls of the citadel of Machu Picchu. Remember what you discovered in the virtual academic visit to Cuzco (see: => Cuzco #23) about the Incas' stones as recording devices. Indeed, one gets a mysterious feeling or intuition about something magical or unknown as one walks along these stone walls.
Humanities note: The monumentality and durability of stone is one of the core notions of pre-Columbian Latin American humanities in art and architecture.