It also shows a number of strange structures which are still entirely unexplained and whose history is entirely unknown.
In particular the stone cut in this scene here: [youtu.be] where it appears like someone has drawn with their finger in clay, except this is solid limestone. It seems to be evidence of a vibrational cutting technique or some other method that renders the rock "ductile". This makes no sense because limestone cannot be liquified by heat or any known method - and yet that is the only similar explanation for the type of manipulation shown here.
In terms of vibrational manipulation of stone (through sound) and actually "phasing" through solid matter, there are actually a number of stories and legends about just such a phenomena among the yogis and siddhas of India. While there are tons of legends about everything, it is worth noting, just for reference. In other words, these stories reference feats accomplished without technology, but rather instead through techniques of the mind.