Begin your honeymoon with a romantic walk along the Marina Beach, the second-longest urban beach in the world. Take a stroll with your loved one, feel the sand under your feet, and witness the beautiful sunrise or sunset. You can also indulge in activities like horse riding, kite flying or even taking a dip in the sea. There are plenty of street food vendors selling local delicacies such as masala peanuts, sundal, etc.
Located on the East Coast, Mahabalipuram has numerous temples and shrines that are famous for their carvings. Visit the Shore Temple and Pancha Rathas which are set on the coast and watch the sun go down along the Bay of Bengal. Take a stroll in the ancient town and marvel at the beautiful architecture of the temples and shires. You can also visit the nearby Crocodile Park and see the reptile species that are native to India.
On your last day in Chennai, head over to the Muttukadu Backwaters. This place is perfect for a romantic boat ride with your loved one. The serenity of this place attracts a lot of migratory birds making it bird-watching heaven. Take a tour of the backwaters in the traditional houseboats known as "Kettuvallams". The greenery and tranquility make this an ideal place to spend your last day in Chennai.
If you have an additional day, make a trip to the Arignar Anna Zoological Park, one of the largest zoos in India. If you have more time, add a visit to Phoenix Market City, a popular shopping mall where you can shop for souvenirs and try different cuisines. If you have less time, remove the crocodile park visit and add a visit to the Kapaleeshwarar Temple.