The pyramids contain a complex system of tunnels made of limestone. Incredible discoveries have been made within these tunnels, and scientists have not yet been able to explore every corner of the intricate labyrinth.
Conspiracy theorists even believe that scholars and scientists are hiding in an underworld of catacombs beneath the pyramids. It is also believed that there are many more labyrinths beneath the city of Hawara, located 55 miles from Cairo, based on various ancient texts. Authors such as Herodotus and Strabo allude to this.