mike barnes
New member
I've noticed in some distant far off place that I'm digging, ie South Wales, that there is an abundance of yellow patches, possibly algae or some sort of living thing, which coats the rocks. It seems to be only in the sections with a fairly strong draught, and I'm wondering if it really is as the title suggests, follow the yellow spot road, (it's a large boulder choke). Does the continuous draught somehow feed/nurture this apparently living organism. Anybody know what it is and indeed, is it showing me the way to that monster passage?