Sydney's central business district (CBD) extends southwards for about 3 kilometres (1.25 mi) from Sydney Cove, the point of the first European settlement in the area at the southern end of the bridge known as "The Rocks". Densely concentrated skyscrapers including Sydney Tower which is the city's tallest structure. Other buildings including historic sandstone buildings such as the Sydney Town Hall and Queen Victoria Building are interspersed by several parks such as Wynyard and Hyde Park. The Sydney CBD is bounded on the east side by a chain of parkland that extends from Hyde Park through the Domain and Royal Botanic Gardens to Farm Cove on the harbour. The west side is bounded by Darling Harbour, a popular tourist and nightlife precinct while Central station marks the southern end of the CBD. George Street serves as the Sydney CBD's main north-south thoroughfare.The extensive area covered by urban Sydney is formally divided into more than 300 suburbs (for addressing and postal purposes), and administered as 38 local government areas. There is no city-wide government, but the Government of New South Wales and its agencies have extensive responsibilities in providing metropolitan services. The City of Sydney itself covers a fairly small area comprising the central business district and its neighbouring inner-city suburbs. In addition, regional descriptions are used informally to conveniently describe larger sections of the urban area. These include Eastern Suburbs, Hills District, Inner West, Canterbury-Bankstown, Lower North Shore, Northern Beaches, Northern Suburbs, North Shore, St George, Southern Sydney, South-eastern Sydney, South-western Sydney, Sutherland Shire and Western Sydney. However, many suburbs are not conveniently covered by any of these categories.