Top PostsWales

Llechwedd Slate Caverns

Llechwedd slate caverns

The Llechwedd Slate Caverns are an old mining network under the mountains of Snowdonia. The caverns and tunnels are hewn from the solid rock of the mountains.


On the surface

Llechwedd lies in the town of Blaenau Ffestiniog, once the largest town in north Wales after Wrexham, but its population fell with the decline of the slate industry.

Steps linking two chambers

Tours of the caverns recreate the everyday lives of Victorian slate miners. On the Deep Mine Tour you can explore a series of caverns and chambers that go down twelve levels into the interior of the mountain.

Exploring the caverns
Lights and reflections on the water

There is a spectacular underground lake, lit up with gold, red and green light. The water fills the cavern and is perfectly clear. This lake deep in the chasm of the mountain is one of the most beautiful places I have ever been to. The atmosphere of the cold stone cavern, with its clear icy water in the heart of the mountain, is eerie and filled with deep, ancient silence.

The underground lake


For more information on the caverns visit:

One thought on “Llechwedd Slate Caverns

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.