Chwarel Hen Llanfair Slate Caverns, near Harlech, Gwynedd, North Wales

The entrance to the cavernsCHWAREL HÊN, LLANFAIR SLATE CAVERNS
The entry to this old but important slate mine is through the main tunnel, under the twin arches of the crypt, and into the lofty cathedral cavern. Remember that the tunnels and caverns you are about to see are all man made over a 100 years ago with only a candle for lighting.

A view of one of the chambersThe slate in this mine, which is found in veins between layers of ancient Pre-Cambrian rocks, is among the oldest in the world. Many industrial towns in Britain and Ireland have the original roofs made of Llanfair slate.

Descend Jacobs ladder and wonder through the tunnels and chambers, and look for the old drilling holes, and the likeness of a human face in the mighty no 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. Look down at Shell Island and the Artro estuary, and at low tide trace the fourteen mile long natural causeway of St Patrick.


SEPARATE ATTRACTION (Extra charge) Open May-Sept.
Children's Farm park. Cuddle baby rabbits, bottle feed a lamb, goat feeding, nature and woodland walk.
Click here to visit the Children's Farm Park website


Our souvenir shop and rock mineral section is a must, stocking an extensive range of interesting items for you to remind you of your visit to this unique slate cavern complex.

And if you get hungry or thirsty after your visit, the cafeteria serves hot drinks, snacks and cream teas.

Adults: £6.50 -- Children: £5.50 -- OAP: £5.75
Family (2+2): £23.00 -- Family (2+3): £27.50

Easter to mid September: 10am - 5pm (Last entry 4pm)
Mid Sep to End Sep: 11am - 4pm

Closed 1st October - 15th October
16th October to 30th Oct: 11am - 4pm.

We are open 7 days a week


For admission prices, group bookings and any additional information you might require, please don't hesitate to call us on 01766 780 247
Or send an email to


We are situated on the A496 coast road, 1 mile south of Harlech (Look for the brown tourist signs pointing the way!)


Hen Chwaren Llanfair Slate caverns is located just one mile south of Harlech, in Snowdonia, Gwynedd, North Wales


Coaches welcome
Special rates are available for parties
A picnic area is also available



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