I don´t know it for sure, but most of the tunnels (ancient) were built by the Tartars (or whatever you want to call them..). It is said, that the tunnels (ancient) were built originally as water canals (worldwide power grid). But since the great destruction horrible misused from the rulers of the darkness. They are also genetically crossing humans with animals, these creatures indeed look like aliens too.

wasn't the hanging gardens of babylon a result of tunnel water irrigation?

idk - I've heard various reports stating that the Aliens built the tunnels as their habitat bc they can not function w/out genetic engineering in our atmosphere, oxygen and sunlight, hence the tunnels. They have been mining minerals in the tunnels and feed on humans -- using their technology as bribes. (a.I., black goo, med beds, levitation) Gene Decode / Kerry Cassidy / Phil Schneider / Dr. Salla / Secret Space Program "20 and Back" and it seems to be a consensus of opinion ... Its a logical course for the development of this satanic order / honey pots / andrenochrome.

After all that terror it didn't even mention what they might encounter or the heartbreak they may see. 😱🤯🙏🙏🙏

Exactly, and "what" they are fighting.
Not just evil but alien beings that are evil.

YES - I've heard that they are also being treated with MEDBED tech alongside the children that survived.

It is clear to me that another species that cannot exist above ground with sunlight and oxygen is trying to reverse our planet to support their existence.

Hence the chemtrails and the Graphene Oxide and HAARP patents are to control the weather ... no sun = no plants = no oxygen