Maybe it's been purposely forgotten / ignored to prevent the world from learning inconvenient truths?
We're learning about massive tunnel networks under Ukraine, maybe Europe is full of them also.
I've spent a fair amount of time in Italy. They are masters of stonework and export thousands of tons of marble even to this day. I know that Bergamo and Pisa have underground tunnels and I've read that the Vatican also has an underground network.
Parisians started mining limestone and gypsum from Paris sometime in the 1200s. There is at least 200 miles worth of mining tunnels under the city that they know about. No telling how many they don't know about.
Maybe it's been purposely forgotten / ignored to prevent the world from learning inconvenient truths?
We're learning about massive tunnel networks under Ukraine, maybe Europe is full of them also.
I've spent a fair amount of time in Italy. They are masters of stonework and export thousands of tons of marble even to this day. I know that Bergamo and Pisa have underground tunnels and I've read that the Vatican also has an underground network.
The underground tunnels under Paris are insane.
Parisians started mining limestone and gypsum from Paris sometime in the 1200s. There is at least 200 miles worth of mining tunnels under the city that they know about. No telling how many they don't know about.