thumb|Longneck Lagoon viewed from Cattai Road
thumb|A mudflat in Longneck Lagoon
thumb|A sign on the track around Longneck Lagoon
The Scheyville National Park () is a protected national park that is located in the northwestern suburbs of Sydney in New South Wales, in eastern Australia. The national park is situated approximately northwest of the Sydney central business district, northeast of , near the settlement of . Longneck Lagoon lies in the northern section of the park. It was added to the New South Wales State Heritage Register on 9 April 2010.
Overview
The cultural sites of Scheyville reflect many major themes in Australia's development since European settlement.
Beginning in 1804, the area was set aside as a public common for the people of the district. The Pitt Town Cooperative Labour Settlement was established in 1893, followed by a Casual Labour Farm where unemployed men could live while finding other work.
William Frances Schey, MP for Redfern and Darlington, helped this tradition of experimental farming continue in the form of the Government Agricultural Training Farm. The training scheme was a program to promote and assist the migration of British Youths willing to become farm workers.
After the outbreak of World War II the training farm was taken over the Commonwealth with the 73rd Australian Anti Aircraft Search Light Company and the RAAF 244 1ST Parachute Battalion being stationed there.
During the post-war immigration wave of the 1950s the lands and buildings at Scheyville became the starting point for thousands of immigrants seeking a new life in Australia.
From 1965 to 1973 Scheyville became the home of the Officer Training Unit. An intense six-month course designed to turn out officers capable of leading a platoon in Vietnam was offered to National Servicemen. After years of neglect and many development proposals for the land, Scheyville was finally gazetted as a national park in early 1996.
Surviving aspects of historical significance
Scheyville National Park is located in the Hawkesbury region on the edge of the Cumberland Plain near the Hawkesbury River and Pitt Town Bottoms. The park comprises an area of 954 hectares and is bound by Midson Road and Scheyville Road to the east, Old Pitt Town Road and Old Stock Route Road to the West, Pitt Town Dural Road to the north and residential properties facing Saunders road to the south and boundaries with properties along Avondale, Whitmore, Greenfiled, Phipps and Old Stock Route Roads in the lower Longneck Catchment. The highest number of sites were found on the margins of Longneck Lagoon and along Longneck and Llewellyn Creeks. The sites, which include stone cores and occupation sites, have generally been heavily disturbed by previous farming activities and floods and are not easily recognisable or interpreted to visitors. No Aboriginal sites have been found on Pitt Town Nature Reserve, however it is possible that sites and artefacts are buried beneath alluvial deposits.