Great post. A few years ago we did an explore on the western heights tunnels in Dover which was interesting. Over the years I've gotten to know the tunnel systems from Ramsgate to Folkestone. There's even small wartime tunnels and bunkers sitting derelict and forgotten in Kingsdown and St. Margaret on Cliff that are sort of hidden in plain site. Those were a blast to look around. Great post. Really enjoyed that. Always great to see urban explorers diving in. :)