Lewis (Scottish Gaelic: Leòdhas, pronounced [ˈʎɔː.əs̪], also Isle of Lewis) is the northern part of Lewis and Harris, the largest island of the Western Isles or Outer Hebrides (an archipelago) of Scotland. The total area of Lewis is 683 square miles (1,770 km2). Lewis is, in general, the lower lying part of Lewis and Harris, with the other part, Harris, being more mountainous. The flatter, more fertile land means Lewis contains the largest settlement, Stornoway, and three-quarters of the population of the Western Isles. Beyond human habitation, the island's diverse habitats are home to an assortment of flora and fauna, such as the golden eagle, red deer and seals and are recognised in a number of conservation areas.
Lewis is of Presbyterian tradition with a rich history, having once been part of the Norse Kingdom of Mann and the Isles. Today, life is very different from elsewhere in Scotland with Sabbath observance, the Gaelic language and peat cutting retaining more importance than elsewhere. Lewis has a rich cultural heritage as can be seen from its myths and legends as well as the local literary and musical traditions. The first evidence of human habitation on Lewis is found in peat samples which indicate that about 8,000 years ago, much of the native woodland was torched to make way for grassland to allow deer to graze. The more striking great monuments of this period are the temples and communal burial cairns at places like Callanish.