Boston is located on the north-eastern Atlantic coast of the United States in Massachussetts and forms the northern limit of the "BosNYWash" megalopolis, a name designating the urban area of the Boston/New York/Washington axis. Boston is divided into 28 districts, partly artificial embankments bordered by Massachusetts Bay to the Eastn Beacon Hill and the Neponset river to the south. The region enjoys a temperate east-coast climate, with a marked temperature range between the seasons: hot, sunny summers that readily extend into September or even into October, the famous "Indian summers", and cold, windy and often snowy winters.