Starting from chennai Ending in kanyakumari there are lot of places which is historical and worth to see between these destinations
Chennai Mahabalipuram Pondicherry, Tiruvannamalai, Kumbakonam, Darasuram Temple, Gangaikodacholapuram, chettinad, Tanjore, Trichy, Madurai, Rameshwaram, Kanyakumari