Aight.
Hi! I'm South East tooUmm, I love finding places that I never knew existed really - anything vaguely interesting! At the moment I have a bit of a thing for derelict buildings...I've been sneaking around building sites with my camera and getting told off for being in places I shouldn't.
http://underground-history.co.uk/front.php
I'm pretty sure you can't go around any of them, but the site is interesting at least!