No, those aren't stitches holding a mountain together. That is a flight of stairs. Believe it or not, the only way to get to the top of these mountains is by climbing up that treacherous flight of stairs.
At its base and its summit are small markets where you can purchase food or any other local goods that catch your fancy.
On the north face of this stone, you can see the letters G and a half completed U. It was the result of a territorial pissing contest between the residents of Guatape and the rural population around El Peñol. It ended with the residents of Guatape trying to write their town name which was then stopped by an angry mob.