Preston

Charnock Hall

Alnwick

Chillingham Castle

Chislehurst

Chislehurst Caves

Nottingham

City Of Caves

Swansea

Craig-y-Nos Castle

Liverpool

Croxteth Hall

Derby

Derby Gaol

Kidderminster

Drakelow Tunnels

Dudley

Dudley Castle

Malton

Eden Camp Museum

Edinburgh

Edinburgh Vaults

Chatham

Fort Amherst

Glamis

Glamis Castle

Dereham

Gressenhall Farm & Workhouse

Edinburgh

Greyfriars Kirkyard

Portsmouth

Groundlings Theatre

Warwick

Guy's Cliffe House

Abergele

Gwrych Castle

Nantwich

Hack Green Nuclear Bunker

Hull

Halsham House