Was watching this Vid of Exploring a WWII

Bunker/Tunnel ect ,Amazing UK Army Engineering, of course this was well before modern technology & techniques - it kinda hit me while watching thinking about Epstein Island ,many of those Islands are Build up of Corral, so Tunneling is Piss easy - but its amazing to see how much (work space) can be hidden in an underground network

-MAJOR UNDERGROUND WORKINGS-

<iframe width="560" height="315" src="https:// www.youtube.com/embed/Ug25K6fWBR0" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

(If my first embed YT Video failed then link is

youtube.com/watch?v=Ug25K6fWBR0 ) - Cheers ,KEK & MAGA