Paul Martin and his team travel up and down the nation looking for undiscovered treasures and forgotten places that tell us about Britain's rich and astonishing history.
Paul takes a look around the extensive archives of Berkeley Castle in Gloucestershire. Clare finds out how Country Life magazine's 115-year-old photographic collection has helped restore the most unlikely of country house interiors. Charlie sings the praises of the famous BT Tower in London. Kelly Holmes finds out more about the history of the Matilda tank.