Machu Picchu was built out of rocks quarried from the mountain it was built on.
Ledges were carved into the base rocks for the carved stones to sit on.
This is a place where they made a mistake and started to put the wall in the wrong place.
The rocks were chipped a bit with a hard stone (usually meteorite) or metal tool, and then a wooden wedge was inserted. This was soaked in water and allowed to slowly expand. This would cause the stone to split along the crystal lines, usually at 90 degree angles.
The least important (and oldest) buildings just had randomly sized chunks of rock, roughly fit together.
Nicer buildings had the stones carefully carved to perfectly fit into each other, like puzzle pieces.
But the best buildings had stones carved into perfect rectangles. They were probably also polished to a shine originally.
Some buildings have puzzle pieces at the bottom but get more rectangular near the top. This might be because building styles changed as the building was under construction.
A lot of the time big natural rocks were incorporated into the walls.
Some of the doorways were very short.
But there were also tall ones.
There were also staircases so narrow that Kerri would have to go down sideways.
This spider also built his home at Machu Picchu.
The wall along the main trail into the city was well fortified.
They keep several llamas on site to cut the grass.
They work very hard.
