Morning: Spend your morning at the Marina Beach - India's longest beach. Enjoy the fresh air and take a stroll along the beach. You could also try some local delicacies at one of the food stalls.
Afternoon: For lunch, head to Saravana Bhavan, a popular vegetarian restaurant known for its South Indian cuisine. After lunch, visit the Government Museum Chennai, which houses a great collection of art and artifacts.
Evening: In the evening, take a walk through the historic Fort St. George, which was built by the British East India Company in the 17th century. You can also visit the St. Mary's Church, the oldest Anglican Church in India, located within the fort.