Hi, a drive From Ross on Wye toward Monmouth ( Henry V birth place) along the Wye valley to Chepstow, is one of the best things to do, castles,& history everywhere, Goodrich Castle, Chepstow Castle, even whats left of Monmouth Castle is worth a look,
Stop at Tintern for the Abbey, all very good i know i live in Forest of Dean, also well worth visiting.Enjoy