first post on here well when i was on a walk around heaton park i saw two unusual access points locked with an old rusty bolt now i have heard story's of underground world war bunkers but i have never been too sure so i have looked into it a bit but i still am struggling to find anything out so i am going to go down and have a look taking a few safety procedures respirator, rope access kit a few other bits and bobs but i am just wondering if anyone has any information they don't seam to look like sewer access because they are very odd pure black and rectangle almost ladder shaped anyway if anyone wants info or has some to share post or message. pleasee