Sarein is a city in Ardabil Province, Iran. Sarein is known for its hot springs. This complex of various thermal springs can be used by reaching the small town of Sarein at the foot of the Sabalan Mountains. Sarein is easily accessible through Ardabil airport and a good quality paved road. Equipped with modern facilities and newly built hotels, Sarein is one of the most visited sites by domestic tourists especially aware of the therapeutic virtues of these springs rich in different minerals. Health tourism is a broad concept that incorporates both medical and wellness tourism. Sarein is one of the largest and the most diverse cities for health tourism. Although health tourism in Iran is in its infancy, it can offer new opportunities, and strengthen the overall competitiveness of Iran's tourism industry.
The Sarein springs are near an inactive volcano in mount Sabalan and its water contains sulphur particles and it is believed that it is good for bone and joint pains. Sarein is also famous for its 'Ashe Doogh' (Yogurt Soups), during the busy summer periods; it is not uncommon for many of the local shops to be seen selling and preparing this soup. Sarein is also very famous for its honey, again like the soup, many of Sarein's shops sell honey which is produced locally by the Bee keepers of the area.
Hot springs have always been in Sarein but the 1990s earthquake caused some of them to get colder or hotter. The water is heated largely by the Sabalan Mountain which is Iran's second highest mountain after Damavand. Many tourists visit Sabalan. Its most interesting feat is the 'crater' top which contains a lake of acidic water. There are 9 hot springs in Sarein, with 'Gavmesh Goli' being the hottest, with water reaching 67 degrees, and turning out around 80 liters per second from the source. There is also several cold water springs nearby, with the most popular being situated in a small village nearby called 'Vila Dareh' – the water here is fizzy and is very good for the kidneys. The most important springs of this area are: Qarah Soo Thermal Spring, Sari Soo Thermal Spring, Gavmish Goly Thermal Spring, and General Thermal Spring.
The main language of Sarein is the Azeri dialect, however Persian is understood. The climate and hot springs are the first attractions to tourists who travel to this region from different parts of Iran and the world. The climate is by far a great asset, and many Iranians from Tehran and other big cities escape to the tranquility and good weather that Sarein has to offer. The population is about 8000, and increases to more than 20000 in the summer because of the many tourists who go there due to the charming climate. It stands 28 km from Ardabil and total area is 1.28 square km2. The word Sarein in the Persian dictionary means "spring's Outlet".