Start your trip with a visit to the ancient town of Mahabalipuram, which is a UNESCO World Heritage Site. You can explore the various stone-carved temples and monuments such as the Shore Temple, Five Rathas, and Arjuna's Penance. You can also visit the beach for a leisurely stroll or take a dip in the ocean. Don't forget to indulge in some local street food and shop for souvenirs at the Mahabalipuram market.
On your second day, head to the Vandalur Zoo, also known as the Arignar Anna Zoological Park. It is one of the largest zoos in South Asia and has a wide variety of animals such as lions, tigers, elephants, and zebras. The zoo also has a butterfly house, a reptile house, and an aquarium. After that, visit the nearby Selaiyur Lake for some boating and relaxation.