From Tiruchirapalli, the NH 45 goes southwest to Dindigul with Sirmalai Hills to its east and the Palani Hills to the west. Part of the Madurai district earlier, Dinditul is a district headquarters now. It has the network of inter-district roads connection Coimbatore, Erode, Karur, Trichy, Madurai and Sivagangai district. Dindigul is the main producer of flowers and grapes in Tamil Nadu and is also famous for locks and tobacco. Chinnalapatti, about 10km from Dindigul town is famous for its silk saris. Kodaikanal, a popular hill resort (2133m) and the temple of Lord Muruga on the Palani Hills are highlights of this district. The Nayaks of Madurai built the massive Dindigul Fort (over 90m above the plain) and during the period 1784-1790, the Tipu Sultan strengthened it. It is the main attraction here. However, in heavy ruins it offers magnificent views of the town and the hills from the top.
Located 27km from Dindigul, the Kamarajar Valley, ringed by the Kannivadi and Palani Hills is a quiet getaway. Surrounded by pepper, cardamom and coffee plantations it has Kamarajar Lake watered by two hill streams the Kallalar and Kodavan. Trekking and motorbike ride along the scenic roads in this valley are refreshing and interesting.