the aerospace sector, as Rolls-Royce Aerospace operates a large wide chord fan-blade manufacturing facility in nearby Barnoldswick. The town's main employment area is located at Whitewalls, which sits astride the boundary with Nelson adjacent to Junction 14 on the M65 motorway. To help stimulate development an undeveloped 5 hectare area of the estate was designated as part of the East Lancashire Enterprise Zone in December 1983 making it, at that time, the smallest Enterprise Zone in the country. This successful estate now extends to over 27 hectares and is home to a wide range businesses including a large abattoir. Walshaw House, the headquarters of the East Lancashire Primary Care Trust, which occupies a recent extension to the estate, reflects recent growth in the service sector. The adjacent retail park contains a large ASDA supermarket and stores for Next, Argos Extra and DFS. Boundary Mill Stores, one of the first factory outlets in the UK, was established here in 1983, but in 2008 it moved into purpose built premises closer to the end of the M65 motorway. In 2013, it is the borough's largest employer, and has stores in Grantham, Newcastle, Walsall and Rotherham. Another local success story was Lyon's Tours, whose headquarters were off Albert Road, close to the town centre. A family-run business, in the 1950s it became one of the first UK tour operators to offer overseas holidays to its customers. The company became part of Airtours when David Crossland purchased a series of small travel agencies across Lancashire in 1972, which in turn merged with the Thomas Cook Group in June 2007. Landmarks Situated on the edge of the Pennines, Colne has views of several well-known hills. Boulsworth Hill, which lies on the boundary between Lancashire and West Yorkshire overlooks the town from the south. From the summit of Noyna Hill to the north, close to the village of Foulridge, it is possible to look out across much of East Lancashire and into the Yorkshire Dales. Blacko Tower (Stansfield Tower) is clearly visible to the north west, across White Moor, which forms the long eastern slope of Weets Hill. The hamlet of Wycoller, off the road to Haworth, is the focus for the Country Park of the same name. Although traffic free (visitors must park outside the village), the peace and tranquility is often broken in the summer months as tourists are drawn to the visitor centre