In the morning, visit the Kapaleeswarar Temple, one of the oldest temples in Chennai, and steep in the Dravidian architecture. In the afternoon, head to Fort St. George, the first British fortress in India, and explore the museum inside. In the evening, take a stroll at the Marina Beach and enjoy the sunset over the Bay of Bengal.
Spend the morning driving to Madurai, and check out the 16th-century Meenakshi Amman Temple, one of the most famous temples in India. In the afternoon, go on a foodie trail and try local snacks like Jigar Thanda and Paruthi Pal. In the evening, visit the Gandhi Memorial Museum and learn about India's freedom movement.
Drive to Tanjore and visit the Brihadeeswara Temple, a UNESCO World Heritage Site that showcases the Chola architecture. In the afternoon, head to the Tanjore Palace and Art Gallery to see the exhibits of the Nayak and Maratha dynasties. In the evening, check out the local markets and buy traditional handicrafts.
Drive to Pondicherry and visit the Aurobindo Ashram, where you can meditate and learn about the teachings of Sri Aurobindo. In the afternoon, head to the Promenade and take a stroll along the French Quarter. In the evening, visit the Basilica of the Sacred Heart of Jesus and attend the evening mass.
If you have extra time, visit the UNESCO World Heritage Site of Mahabalipuram and see the Shore Temple and the Five Rathas. You can also take a trip to Ooty and visit the Botanical Gardens and tea plantations. To maximize your fun, try the local cuisine like Dosa, Sambar, and Rasam. You can also attend a classical dance performance or a Carnatic music concert.