One of the most important land form are plains. They are extensive flat low lying land areas those are very fertile. The reason is because most plains are formed by the deposition of alluvium and are called Alluvial Plains. The plains are densely populated as of the flat and level land where is it easy to built settlements. They even have favourable climatic conditions. The plains found along the coast are called coastal plains. They are known for agriculture, fishery and trade. The Durmstrang Institute was on plain.