Location llwyn onn guest house is in merthyr tydfil brecon beacons national park and area attractions include brecon beacons national park property features the guesthouse offers a restaurant a complimentary breakfast is available additional amenities include barbecue grills and a picnic area complimentary self parking is available onsite for guests this is a smoke free property guestrooms the 11 guestrooms at llwyn onn guest house include coffeetea makers televisions are equipped