The rock is formed of Nottingham Castle Sandstone, a pale brownish sandstone that is about 65 metres thick in the Nottingham area.
It is soft and crumbly and easy to dig out. Caves and tunnels in Castle Rock have been used as stables, tanneries, storage cellars for beer, and as homes. There are more caves in Nottingham than in any other British city, and all are man made.
|This is part of a restored Victorian fern garden|
I didn’t take a tour this time, but they take you from the Castle, down into King David’s dungeon and Mortimer’s Hole. The tour includes 300 steps.
Nearby is the Museum of Nottingham Life at Brewhouse Yard.