The subterranean center of Norfolk is Norwich, which has the UK's largest collection of undercrofts. More than 80 undercrofts are known, only a few are open to the public. At the moment the city plans to open a few more as tourist sights. Already open to the public are undercrofts at Bedford Street, St Andrew's Hall, the Bridewell Museum, Norwich Cathedral, Stranger's Hall, Guildhall, Dragon Hall, Music House, Norwich Castle, Princes Street, Augustine Steward's House and Tombland.