[OldNewYork]

Very interesting. Are they all built into the foot of a hill or a mountain; do they all slope downward to flat land below? I was just reading about qanat irrigation - maybe this is something like that.

[Sacajaweau]

I was looking at the elevations also. I suggested grain storage/flyway....as I have seen something like this before.

They said three of the tunnels had millstones in them.

I think they're missing a concept...One being that many begin in kitchens.

I'd say they're gonna feel really, really stupid when they find out the primary use...