Great Witcombe is a large Roman viilla that is open to tourists.
There are significant visible remains to see incluidng a hypocaust, bath house, latrine and household shrine.
see Wikipedia
see Pastscape
see Peter Leach with Lynne Bevan and Trevor Pearson 1998 Great Witcombe Roman Villa, Gloucestershire: a report on excavations by Ernest Greenfield 1960-1973