Archaeologists in a central Tasmanian town have uncovered the footings of colonial-era solitary cells and gallows from the former Oatlands Gaol, which was buried under an old council swimming pool. The former penitentiary, decommissioned in the 1930s, was once a major correctional facility in Van Diemen's Land. The local archaeological team wants to restore the site as an open heritage attraction for public access.