Before going to tour the slate mines, take the wonderful narrow gauge Ffestiniog Railway that goes from Porthmadog up to Blaenau Ffestiniog.

In the Llechwedd Slate Caverns, take the miners underground tramway deep into the mines, following a maze of tunnels. There are also plenty of slag heaps around town too.

For another industrial treat, visit the Ffestiniog Power Station and Stwlan Dam, beautiful views and guided tours of the power plant.