The Tiruchirapalli Rock Fort is a historic fort and temple complex built on an ancient rock. It is located in the town of Tiruchirapalli, which is in the Indian state of Tamil Nadu. The 83-metre rock fort situated in the center of town is a major landmark in the town of Tiruchirapalli and is visible from a long distance. This is also a major tourist spot. Other local tourist attractions include the famous Pallava-era Ganesa temple and the Nayaka-era fort. The fort complex has witnessed fierce battles between Madurai Nayakas and Bijapur, Carnatic and Maratha forces. The fort played an important part during the Carnatic wars, helping lay the foundations of the British Empire in India.
Know more in Wikipedia