I was there about that time too when you could walk right out to the stones.
However, there were numerous low-lifes carving their initials into the stones, etc., so...
They built a wall (fence) to keep people out.
“However, there were numerous low-lifes carving their initials into the stones, etc., so...”
A long time ago you could climb the pyramids to the top (since closed).
At the top of the great pyramid there was a lot of graffiti carved in it -— in Greek, Aramaic, and Latin. It was fascinating in and of itself.