Your entry into this old but important slate mine is through the main tunnel, under the twin arches of the crypt and into the lofty, spectacular, cathedral cavern. The mine's tunnels and caverns are all man made and over a century old. It's famous slate, found in long veins between layers of pre-Cambrian rocks, is amongst the oldest in the world. Many houses and factories in the industrial towns of Britain and Ireland have roofs made from hard wearing Llanfair slate.
Descend Jacob's Ladder to wander through the tunnels and chambers and look for the old drilling holes. See if you can spot the likeness of a human face in the mighty Number 6 Cavern! As you emerge from the caverns, you face the breathtaking view of Cardigan Bay from the Preseli Mountains in the south to the Lleyn Peninsular in the north.
From the mine's entrance you can look down at Shell Island and the Artro Estuary. At low tide the entire fourteen mile length of St Patrick's Causeway can be seen.