Vivian Quarry in Gwynedd, once part of the world's second-largest slate mine, is now recognised ... hiding old mining buildings, tools and even a circular blast shelter beneath 19 meters of ...

The quarry, on the edge of Eryri (Snowdonia) is part of the vast Dinorwig slate complex ... of relics such as Victorian aged glass bottles, tools, and the heating system for when the machine ...