The Three Castles Walk is a walkling route in Monmouthshire, South Wales which links Skenfrith Castle, Grosmont Castle and White Castle, which were all originally built after the Norman Conquest and possibly all under the supervision of William FitzOsbern (see link, above). The castles changed much during their active time. All are now impressive remains and some of the best remaining examples of such castles in Great Britain. The route follows woods and hills and takes the walker over Graig Syfyrddin (Edmunds Tump), from which there are views of the Welsh Marches, the mountains of South Wales, including the Black Mountains, and the Forest of Dean and beyond. From start to finish at the castle in Skenfrith the walk visits Trevonny, Little Cross, Grosmont, Graig Syfyrddin, Edmund's Tump, Pont Brook, Upper and Lower Green, Pont Gilbert, White Castle, Tump Farm, Llyfos Wood, Great and Little Llan-llwydd, Lettravane Farm, Traveller's Seat, The Boot, Lade and Norton.