Trent & Peak Archaeology / The University of NottinghamMortimer’s Hole, Castle RockMortimer’s Hole is probably Nottingham’s most famous cave, and is reputed to have a vital role in British medieval history. The cave is a 105m-long tunnel which runs from the top of the Castle Rock - the Upper Bailey of the medieval castle - down to the Brewhouse Yard. In the middle ages the River Leen ran close to the bottom of the Castle Rock, and Mortimer’s Hole would have probably been used as a quick route from the river to the Castle. It is most reknowned as the tunnel through which Edward III’s soldiers entered the Castle and captured the dastardly Roger de Mortimer in 1330. You can read more about this on the History page.You can visit Mortimer’s Hole on a guided tour from the Castle. Find out how to do this on the Access page.