Crank Caverns is the common name of the remains of the Rainford Delph Quarry near Crank in St. Helens, Merseyside. It is a network of underground tunnels and caverns, as well as an extensive woodland. Information in the St. Helens local history archives states that sandstone quarrying began here as early as 1730. As the quarry expanded, the cost of purchasing land to open cast mine it increased, so it was decided to opt for a different method. Instead of quarrying out the stone, they would mine it out, following a seam of stone until it ran out. This resulted in the network of caves, tunnels and shafts we see today. Rainford Delph is listed as a Colliery by 1854, under the ownership of Charles Howarth or Yorkshire Charlie as he was known locally by 1880. Mining finally ceased and the woods and caverns were used as a game reserve by the Earl of Derby until 1939, when they became a storage facility for ammunition for the anti-aircraft position at Crank. After the war, the caverns ceased use as a game reserve. Today, Crank Caverns are not officially open to the publicand due to their increasing instability, attempts have been made to close access to the caverns and tunnels themselves. Despite this, the site is still physically accessible from a nearby public footpath and is still a draw for generations of curious locals who wish to explore, many having heard the numerous local myths and legends from an early age.