Tamilnadu Tourism conducts a rail cum road tour which covers Mamallapuram, Kodaikanal, Thanjavur, Rameswaram & Kanniyakumari
The tour will start & end from Chennai central and includes Balaji Darshan at Tirupati.
The tariff for the same will be 12,100/- per adult for Non-AC travel (for 2nd A.C. it will be 18,100/-)
For more details, visit your nearest Tamil Nadu tourism office.
Here is a link to their websites: