The largest lake of the world, Caspian sea (land-blocked body of water), covers an area of 438,000 sq. km. and is located between Iran and countries such as the Republics of Qazaqistan, Turkamanistan, and Azarbayjan. Its southern coast which extends from the Hosseinqoli Gulf to Astara is in the jurisdiction of Iran. In past this lake was known as Heerkani, and in foreign texts and maps was called 'Caspian'. The average depth of this lake in the north is 6 m. and to the west and south west regions is at the most 1,000 m. The coast of this lake is sandy and low-lying, with the Gulfs of Qarah Boqaz and Gorgan to the north east and southeast respectively. The latter is segregated from the Caspian Sea due to the presence of the Miankaleh Peninsula.
The Anzali Wetland also separates from this lake by the Qazian Island. The Caspian Sea comprises of three sections, the northern, central and the southern ones. The Iranian coasts of the Mazandaran Sea stretches to the length and width of 3 to over 30 km. from Astara to Gomishan and the mouth of the Attrak. Its northern landscape engulfs the blue and considerably calm Caspian Sea, and in the southern region, except for the western sector which comprises of high lands and wetlands in general, are the scenic beauty painted by the forests on the skirts of the Alborz Mountains. Much beyond these forests , stand the majestic and snow-capped peaks of Alborz, enhacing a special beauty to the said landscape.  
Besides which, surrounding the coastal area are citrus orchards, rice fields, verdant pastures- all rendering a glorious and eye-catching view! The most important regions in this vicinity that can be interesting regarding tourism are the following: Ramsar - Alamdeh axis, Alamdeh - Babolsar axis, and Babolsar - Farah Abad axis and Behshahr.

 The said structure with a pyramid shaped dome, and in regards to other architectural finishes has both artistic and historical value. There is a beautiful and ancient wooden chest on the tomb with the date 897 AH. engraved on it. Here three personalities have been laid to rest, named as Imamzadeh Abbas, Mohammad and Hassan. The external and internal parts of the structure reveal chalk and brick work, besides the inscriptions. The structure is 23 m. in height.

The brick tower of Imamzadeh Yahya is located in Sary, and has an ancient wooden chest and door. The inscription reveals the date of construction of the chest, being in the year 849 AH. According to records Imamzadeh Yahya is one of the offsprings of Imam Moosa Kazem (AS). The tower of the construction stands to the height of 20 m. circular in shape and with a pyramid like dome.

 This aggregate is at a distance of 28 km. north of Sary, in the village of Farah Abad. During the reign of Shah Abbas Safavid, the same was considered as one of the important structures in the north of Iran. It was because of this reason that the royal palaces, mosques, schools, bazaars, baths, bridges and gardens were set up here. Unfortunately this was destroyed by a group of rebellious Cossacks of the Tzar. Only the mosque remained untouched in this turmoil.
The said structure, that is the mosque comprised of a central court-yard and chambers on the east, west and northern sides. It is unique in architectural techniques and was most probably utilized as a school. Today, this mosque is in a better condition as it has undergone repairs. But unfortunately, due to the passage of time, the palace (Jahanama) is heading towards deterioration.

Some of the rural settlements of Mazandaran province, besides being enveloped with natural beauty, are also endowed with historical attractions. These are named as, Soldeh in Amol, with its large Sadr A'zam Water Reservoir, Esk in Larijan Amol, with the ancient and beautiful Amini residence, Yakh in Noor, with the ancient house of Montazam Lashgar, Sa'adat Abad in Noor with the ancient house of Alameh Noori, Ali Abad in Larijan with the Kolah Farangi edifice, Moqarab Kola in Babol with the Moqarab Kola mourning place, Resket in Sary with the Resket Tower, Yoosh in Noor with the house of Nima Yusheej the contemporary poet of Iran.
Other rural areas of the province prove attractive due to the natural beauty. These are, the village of Langar in Sary, Jawaher Deh in Ramsar, Daulat Abad in Sary, Jennat-e-Roodbar in Galesh Mahaleh of Tonekabon, Eshkavarat-e-Oliya in Ramsar and Shahan Dasht in Amol.