Original sentence: It is advisable to limit your exploration of the tunnels to the bore that is part of the way and avoid the closed tunnel, which might still be dangerous, even if one or other of the protective doors is unlocked.It nonetheless requires a certain level of nerve to navigate the long dark tunnel, especially without a torch.The closed bore has not been restored and the approaches and tunnel itself are regularly flooded.The tunnel is a great visit for anyone interested in railway architecture or who just likes a good scare.The tunnel is easily navigated on foot or by cyclists, and has been effectively restored