For such a small island, Britain has an amazing variety of minerals - most of which have been worked by miners at some point, who have left us an interesting legacy.
Take your pick from one of the 3 tunnels in front of you ...
 |
 |
 |
this passage has a lustrous hue |
blue & green stains the walls |
a dark red tunnel |
If you don't want to wander aimlessly here are some clues: |
||