Day 1: Arrive in Chennai, visit Marina Beach and Kapaleeshwarar Temple. Day 2: Explore Mahabalipuram and Fort St. George. Day 3: Visit San Thome Cathedral and Government Museum. Day 4: Travel to Mahabalipuram and return. Day 5: Explore Guindy National Park and Besant Nagar Beach. Day 6: Visit Kanchipuram and depart. Day 7: Depart from Chennai.