So I'm riding along a not very well used trail in South West France when I see off to my left a large rock with a green door in it. Well, not one to pass up having a nose around I just have to stop and have a look. (couldn't get bike in the pic due to the angle of the trail)
This is carved next to the door.
Open the door.............
Must have taken a huge amount of time and effort to hollow out the rock.
Oh, and here's the bike to go with it!