Garmsar salt mine is one of the huge and extraordinary salt mines in Iran, which is located in Semnan province. In general, Garmsar region has the largest salt mines and tunnels in the Middle East.
Semnan province is located in the southern slopes of the Alborz mountain range and the height of the province decreases from north to south and ends in the desert plain. This province with an area of about 96,000 square kilometers occupies 5.6% of the country's area and in it is the sixth province in the country. The most important tribes living in Semnan province, in addition to Persians are: Turks (Oslanlu, Pazuki, Nafar, Basri, Qashqai, etc.), Arabs (Arab Ameri, Arab Masoumi, Arab Darazi, Kati, Seyyed Tabatabai, etc.), Tabariha (Alikai or Alikai), Lors (Hadavand), Kurds and Gilakis. Among the tribes settled in Semnan province, Sangsary, Parviri , and the native tribes of the province who have come to this land from the distant in past (before Islam) and have settled in it. Other groups, such as the Elikai tribes and clans, Osanloo, Hadavand, Arab Darazi and Kati, are groups that migrated to this area during the reign of rulers and sultans in order to create a barrier for the eastern and southern regions of the country from repeated invasions by Turkmen cavalry. Most residents of Semnan speak Persian. Among the cities of the province, only the residents of Sangsar and Ivanki do not speak Persian and speak Sangsari and Tati languages. Semnani language, which is the most indigenous language of the province, has given its place in the center of the province almost to Persian, but its different types are still common in many cities and villages such as Mahdishahr, Sorkheh or Lasjerd.
Semnan province is bordered by Mazandaran province in the north, by Isfahan province in the south, by Khorasan province in the east and by Tehran province in the west. Adjacency to the Alborz mountain range and the flat lands of the desert has created various climatic conditions for this province. So that the southern part has hot and dry climate, the central regions are temperate, the northeastern part has a cold and dry climate, and the northern part is relatively cold. This climatic diversity has also created diverse vegetation in this province. The center of this province is the city of Semnan and has eight cities including Semnan, Shahroud, Damghan, Garmsar, Mahdishahr, Miami and Aradan and Sorkheh.
The people of Semnan, like the people of other parts of Iran, have their own customs and traditions, all of which are rooted in the cultural history, geographical and climatic conditions and lifestyle of the people of this land. These customs show themselves in various ceremonies and rituals such as Eid-e Nowruz (new year), mourning ceremonies, Ramadan, etc.
Regarding the handicrafts of this province, various types of art can be named such as: mosaics, inlays, porcelain knots and wooden volumes to large metal nets, metal sculptures and iron figures, delicate silk hand-woven, traditional and colored handkerchiefs, the method of calligraphy, gilding of gold, kilim and glitch, Jajim, pottery, felt, Parche ghalamkar, etc. They are all among the handicrafts of Semnan province and the crystallization of the art of the people of this region.
Semnan's sights have a great variety of attractions and are a collection of valuable historical monuments in nature and desert lands. Rag gate, Grand Mosque, Cheshmeh Gholghol, Jangal abr (Cloud Forest), Cheshmeh Ali Mansion, Ahovan, Bastam Complex, Rudbarak Forest, Aftagardan Kalposh Plain, Rezaabad, Turan National Park, Chehel Dokhtaran (Forty Girls) Tower, Martian Hills are some of the attractions in this province.
Padeh village in Semnan is located four kilometers northeast of Aradan city. Padeh village is located in a desert region with a semi-desert climate. The climate of this village is hot in summer and cold in winter, so the best time to visit Padeh village is spring and autumn.
Pir Alamdar Damghan Tower, which is one of the prominent examples of architecture in the fifth century AH, is located in Shahid Motahari St., Damghan, Semnan Province.
Semnan Hazrat bathhouse or Pahne bath is among the tourism attractions of this city and is recomended for the tourists who travel to Semnan province.
This brick gate, which stands out in the middle of the most important square of the city, belongs to the Qajar period.
Semnan central mosque is known as the oldest building of the post-Islamic period is in Semnan province. The Central Mosque is also called Adineh Mosque or Jome (Friday) Mosque. This mosque was built in the first century AH on the destruction of fire temple.