Gilan province lies along the Caspian Sea, just west of the province of Mazandaran, east of the province of Ardabil, and north of the provinces of Zanjan and Qazvin. Rasht is the capital of the province. Gilan has a humid subtropical climate with by a large margin the heaviest rainfall in Iran. Rasht, the capital of the province, is known internationally as the "City of Silver Rains" and within Iran as the "City of Rain". Rainfall is heaviest between September and December because the onshore winds from the Siberian High are strongest, but it occurs throughout the year though least abundantly from April to July. The Alborz range provides further diversity to the land in addition to the Caspian coasts. The coastline is cooler and attracts large numbers of domestic and international tourists. Large parts of the province are mountainous, green and forested.