The district comprises the floodplain of the Ruamahanga River and the associated Lake Wairarapa, as well as the long southern stretch of Palliser Bay.The third-largest town and the seat of the district council is Martinborough; it is the centre of a nationally important wine-producing area.It is expected that the number of people living in the district's urban areas will increase due to rising property prices in Wellington proper, and the proximity to transport links.[6] Because of South Wairarapa's proximity to the capital city of New Zealand, Wellington, there are close links between the two areas.The Wairarapa Line, part of the Metlink public transport network for the Wellington region, passes through the district (which is served by the two stations of Featherston and Woodside) and provides a faster method of transport into the city than the Remutaka pass road.