Melbourne is often referred to as Australia's garden city, and the state of Victoria was once known as the garden state. There is an abundance of parks and gardens in Melbourne, many close to the CBD with a variety of common and rare plant species amid landscaped vistas, pedestrian pathways and tree-lined avenues. Melbourne's parks are often considered the best public parks in all of Australia's major cities. There are also many parks in the surrounding suburbs of Melbourne, such as in the municipalities of Stonnington, Boroondara and Port Phillip, south east of the central business district. The extensive area covered by urban Melbourne is formally divided into hundreds of suburbs (for addressing and postal purposes), and administered as local government areas 31 of which are located within the metropolitan area.