 Major waterways in the region include the Parramatta River, Lane Cove River and the many creek systems that branch out from these.The region is home to many parks and nature reserves — The Lane Cove National Park and the Garigal National Park include many areas of remnant bushland adjacent to the Lane Cove River and Middle Harbour.The Hills District, situated halfway between the northern suburbs and greater western Sydney, is a region so named for its characteristically comparatively hilly topography, akin to the Northern Suburbs and North Shore.