The Rock Fort is a famous monument in Trichy. It is situated on an 88 metres tall monolithic hillock which is believed to be 3800 million years old. Rock Fort is also very ancient and dates back as old as 2 billion years. The fort was built by Pallavas rules and was added upon the rulers of the Nayak Dynasty. There are three temples inside the complex – One of Lord Shiva and two of Lord Ganapathy. The Lord Shiva Temple is grand and has beautiful architecture. The summit of the Fort offers panoramic views of the city which can be enjoyed with the cool breeze up there.