Hendre is situated not far from Mold in north wales. The mineral extracted from this mine up until the early 1980’s was fluorite also known as fluorspar. It comercialy had quite a few uses some of which bieng a flux for iron smelting, and flouride thats found in toothpaste.

Fluorspar comes in many different colours and because of this it was also used in jewellery, most famously was the blue or purple form that is mined from the blue john caverns in Derbyshire.

This mine is not the most extensive mine but the chambers are huge in this place.

This photograph shows the lowest level that you can get to now without diving gear.