Subterranea Britannica: Sites: Camden Catacombs
Link 1: Subterranea Britannica: Sites: camden_catacombs
An interesting complex of tunnels and vaults are to be found close to the Roundhouse at Camden. The Camden Catacombs, as they have become known are were once owned by British Railwaysbut have now passed into multiple ownership. Some sections were demolished during the redevelopment of the area while other sections belong to Camden Market who discourage access.
Link 2: Subterranea Britannica