Property Location With a stay at Llwyn Onn Guest House in Merthyr Tydfil, you'll be within a 10-minute drive of Joseph Parry's Ironworker's Cottage and Cyfarthfa Park and Museum. This 4-star guesthouse is 15.1 mi (24.4 km) from Pen y Fan and 18.1 mi (29.1 km) from Rhondda Valley.Rooms Make yourself at home in one of the 11 guestrooms featuring refrigerators. Satellite television is provided for your entertainment. Conveniences include desks and coffee/tea makers.Amenities Make use of convenient amenities, which include a picnic area and barbecue grills.Dining At Llwyn Onn Guest House, enjoy a satisfying meal at the restaurant. Breakfast is available for a fee.Business, Other Amenities Free self parking is available onsite.