Wikipedia
Tuyserkan (, also Romanized as Tūyserkān, Tooyserkan, Tūīsarkān, and Tūysarkān) is a city in and capital of Tuyserkan County, Hamadan Province, Iran. At the 2006 census, its population was 42,520, in 11,802 families.
Tuyserkan is located about 100 km south of Hamadan, in western Iran. However, it was formerly called Roud Avar. Latter was ruined in the invasion of the Mongols and its people fled to Toy (or Tuy) village, afterwards called Toyserkan because of its proximity to Serkan (a town located northwest of Toyserkan). The ancient hills of Baba Kamal, Roudlar, Shahrestaneh, the remains of a Sassanid city in Velashjerd, the Saljuk Dome named after prophet Habakkuk, the Safavid building of Shaykh Ali Khani School and the Qajar period’s covered bazaar, are all indicative of Toyserkan’s historical background. Toyserkan is well known for its quality Walnut trees within Iran and the world. Its weather is mild and nice in the summer and cold in the winter, the city is surrendered by Zagros Mountains with great views and landscapes.