Driftwood Motel and Castles Motel, we are one now! All units can be booked from our booking page. Driftwood Motel address: 21 Muritai St, Tahunanui, Nelson. Castles Motel address: 44 Tahunanui Drive, Nelson. Please check our map here. Driftwood Motel is the ideal place to relax, after visiting all the scenic attractions that Nelson has to offer.