'Hidden' Roman fort relies on moles to unearth treasure
22 May 2012 Last updated at 15:24 BST
A buried and little known Roman fort near Alston, Cumbria is to be turned into a visitor attraction.
Whitley Castle, or Epiacum, at Castle Nook Farm has not been explored by archaeologists apart from one small dig in 1957.
Because it is a scheduled ancient monument no-one is allowed to dig there.
But that does not mean tantalising clues are not being unearthed, as Gerry Jackson reports.