Begin your trip with a visit to Fort St. George, the oldest structure in Chennai built-in 1644. Tour the museum before heading to the ramparts and the St. Mary's Church, the oldest Anglican church in India. After, head to Marina Beach, the second-longest urban beach in the world. Watch the sunset and try some street food.
Start your day with a visit to Kapaleeswarar Temple, a colorful Hindu temple dedicated to Lord Shiva that dates back to the 7th century. Afternoon, head to Mahabalipuram, a UNESCO world heritage site, famous for ancient temples and rock carvings. Do not miss the Shore Temple, the Five Rathas, and the Krishna's Butterball.
Conclude your journey with a visit to the Government Museum, a treasure trove of archeological finds, bronze sculptures, and traditional art and crafts. Later on, visit Valluvar Kottam, a monument honoring the poet Tiruvalluvar, featuring his famous verses written on 1,300 granite blocks. Finish your trip with a shopping spree for souvenirs at the nearby T-Nagar market.
If you have extra time, explore the Pulicat Lake Bird Sanctuary, take a trip to nearby Kanchipuram, the city of thousand temples or explore the food scene. In case you're short on time, skip Valluvar Kottam, or Marina Beach in case of rain. Additionally, hire a tour guide for the Government Museum for a more informative experience.