My Girlfriend and I are hoping to spend 4 weeks exploring the west and south-west regions of the U.S. We are travelling from Ireland, and although I've travelled on the east coast I've no idea of what awaits me on the west coast. We intend on flying into L.A in early september, renting a car and taking it from there. Obviously we'd want to visit such places as the grand canyon, san francisco, Las Vages and arrive back in L.A to fly home. Any advice on routes and places to visit along the way would be much appreciated.