A site complex in the New Guinea Highlands, near Mount Hangen, which has produced several systems of swamp-drainage ditches, going back to about 7000 BC. A drain and evidence of clearance took place then and a sequence of field systems were made from about 6000 bp to the present. The findings have great significance because they appear to document a totally independent origin of horticulture in the New Guinea Highlands, quite separate from any Austronesian influence. There is also a 30,000-year-old hearth.