Welbeck Abbey.

From an Old Postcard.  

 

 

Welbeck abbey with it's many underground passages and rooms.

Little remains of the original Abbey but the house is in regular use as an army college. 

The old gas works is now a museum and the glasshouses and other buildings being restored and are used as part of a garden centre.

http://www.warsopweb.co.uk/articles/history/mole.htm

South Lodge.