The group of monuments at Mahabalipuram is a collection of 7th- and 8th-century CE religious monuments in the coastal resort town of Mamallapuram, Tamil Nadu, India and a UNESCO World Heritage Site. It is on the Coromandel Coast of the Bay of Bengal, about 60 kilometres (37 mi) south of Chennai.
en.wikipedia.org / wiki / Group_of_Monuments_at_Mahabalipuram (can't able to post link)
The above is a good place to visit if you interested in seeing historical places. Also you can visit Pondicherry 90 miles from chennai which was a french colony.
en.wikipedia.org /wiki / Tourism_in_Puducherry (can't able to post link)