One of the most magnificent citadels of South India, Gingee Fort, in Villupuram, is perched upon three hillocks - Rajagiri, Krishnagiri and Chandrayanadurg. Comprising palatial, military and religious structures, the fort forms a huge triangular enclosed area.

The prime attraction of the fort complex is Rajagiri, which houses the multi-storeyed Kalyana Mahal, adorned with a pyramidal top. Right next to it is an open ground featuring a wide stone platform. The lower part of Rajagiri Hill holds the remains of palaces, granaries and an elephant tank. There's also a temple dedicated to the guardian deity, Kamalakanni Amman. One can also see a watchtower and a few cannons near this temple. The 16th-century Venkataramana Temple is another attraction at Gingee Fort. Built by the Nayaks, it stands outside Rajagiri Hill's innermost fortification. The fort lies at a distance of 40 km from Tiruvannamalai and makes for a great one-day excursion.

Gingee Fort served as the residence for most dynasties of South India during the medieval period, and is said to have been built by the Chola rulers in the 13th century.