Eric Robson and the team are in the magical surroundings of Alnwick Castle, Northumberland.
Chris Beardshaw explores Alnwick's treacherous Poison Garden.
Meanwhile, Bunny Guinness is perched in a treetop, inside one of the largest treehouses in the world: 'A How To' on building treehouses.
Produced by Lucy Dichmont and Howard Shannon
A Somethin' Else production for BBC Radio 4.