Day 1: Arrive in Chennai, visit Marina Beach and San Thome Cathedral. Day 2: Explore Mahabalipuram and return. Day 3: Visit Kapaleeshwarar Temple and return. Day 4: Travel to Mahabalipuram and return. Day 5: Explore Guindy National Park and return. Day 6: Visit Valluvar Kottam and depart. Day 7: Depart from Chennai.