George Reisner did not excavate the largest pyramid on the site because fractures in the rock suggested it would be a dangerous undertaking.
Architect Nacho Forcadell built a scaffolding in the pyramid chambers to protect from potential collapse, allowing us to fully excavate the underground rooms.
How to Excavate a Pyramid, a short film by Jack Cheng
For further information, see our official field Reports or blog posts on the pyramid.