Carnglaze Caverns consists of three man-made caverns formed as part of a slate quarry in 6.5 acres of wooded hillside in the Loveny Valley, near the village of St Neot, Liskeard, Cornwall.
Visitors can go on a guided tour, lasting for about 45 minutes, through the three caverns of cathedral proportions, hand created by local slate miners. Within the complex is a subterranean lake with clear blue/green water. The tour takes you about 150m into the hillside and 60m below ground.
Carnglaze which means "blue rock pile" in Cornish, goes back long before the dinosaurs roamed the earth. The mud which would become the slate that is Carnglaze was being laid down underneath the seas from as long ago as 500 million years.
The first of the caverns, the Rum Store, is so called because it was used by the Royal Navy during the Second World War to store its supply of rum apparently Bats left the mines as they could not tolerate the strong fumes given off by the rum barrels.
In 2001 it was converted into an auditorium with seating for 400. The slate walls and roof form a stunning backdrop for performances, making this a unique venue. Due to the shape and height of the cavern, the acoustics are outstanding and are acclaimed by many of the international performers who have been to The Rum Store.
Carnglaze holds a number of theatre productions and music concerts throughout the year – check their website for what’s on during your visit.
A unique display of South West minerals can be seen in the Rum Store chamber. The caverns are at a constant 10°C, so a jumper and sensible footwear are recommended.
Due to popular demand Carnglaze is now open all year, from Monday to Saturday from 10am until 5pm with the last tour starting at 4pm. Throughout August Carnglaze is open until 8pm. Dogs on leads are welcome at all times in the gardens, Dell and Woodland Walk with careful owners.