I was in Giants yesterday for a short trip and just before getting to Garlands pot there was a strange chemical smell! only in one area, it was just after boss aven! Any idea?

Does anyone know, what is behind the steel door as you go down the track to Giants? it's on the left after the gate in a small cliff. Does this have a name?

Reading the topic "whats lurking under Bristol" it prompted me to think about a mine that falls under my jurisdiction.  In my spare time I'm the county caving advisor for Bucks Scouts and some years ago I was asked to look at a Limestone mine on a Scout Campsite at Cosgrove. The site boarders...

If you follow the stream up past Sidcot, Goatchurch and the Spring you come to a metal door? now locked, door previously blocked from opening by mud, rocks etc. The whole thing looks man made is it a water adit (spelt wrong probably) or an old mine entrance? Can anyone shed light on this?