Lahijan is a Caspian sea resort in and the capital of Lahijan County, Gilan Province, The resort Lahijan has both traditional and modern architecture. The town, which has an Iranian-European urban structure, lies on the northern slope of the Alborz mountains. Its culture and climatic favorable condition have made Lahijan a major tourist hub in northern Iran. The city is basically founded on the sediments remaining from big rivers in Gilan, including the Sefid-Rud (White River). Historically, the city was the major business center and of course the capital of East Gilan during the time of special rulers. Lahijan has also been a tourism hub of the Islamic world during different eras in Iran's history.