High Quality Content by WIKIPEDIA articles! Road 23 is a road in western Iran. It connects Miandoab to Bijar and Hamadan. The southern part is very important and touristic. Because it connects Hamadan to Alisadr Cave. It is about 60 kilometers from Hamadan to Alisadr Cave. The Ali Sadr Cave is a cave located about 100 kilometers north of Hamedan, western Iran (more accurately at 48°18'E 35°18'N). The cave walls can extend up to 40 meters high, and it contains several large, deep lakes. The cave has a river flowing through it and most travel through the cave system is done with a boat. Ali Sadr cave is situated between the large cities Hamadan, Tehran, and Qom making it a popular destination for Iranians.