Llanfair Slate Caverns offers a unique underground adventure where visitors can explore 10 man-made caverns that have been preserved since the miners left over 100 years ago. From scar marks in the rock to immersive sounds, this self-guided tour provides a glimpse into the hardships of slate workers. With a dog-friendly policy, on-site cafe, and gift shop, it's a great day out for all ages to learn about Welsh slate history while enjoying stunning views and homemade treats.