What do these have in common?

[onlymark]

Not sure if we've seen any of these websites, maybe, maybe not. If so, then skip this and move on.

What do these have in common?

SPOILER: Click to show

They are all semi-unknown hidden places left over from recent history within the UK.
They are tunnels under the London landscape used for old Underground stations or buildings that had a purpose during wartime and no longer needed.
You'd be surprised how many places there still are around that you don't give a second glance to or are behind that door you walk past most days.

www.subbrit.org.uk/sb-sites/sites.shtml
www.abandonedstations.org.uk/
underground-history.co.uk/front.php

[Deleted]

It's amazing the number of websites that exist about that sort of thing. It is often remarkable how much money and effort were expended for naught.

[Deleted]

London is such an interesting place. I used to work in the Aldwych some years back and heard that underneath us were the kind of tunnels that you describe, Mark. It would be fun to go down there and explore them. The ones you posted seem to have a lot of light, but I bet most of them have no light at all.