In the morning, visit the infamous Cellular Jail National Memorial to learn about India's struggle for independence. In the afternoon, head to the nearby Corbyn's Cove Beach for some relaxation time. In the evening, take a stroll around the Marina Park and enjoy the sunset overlooking the Bay of Bengal.
Spend the morning exploring the Mahatma Gandhi Marine National Park, which includes several islands and coral reefs. Take a glass-bottom boat tour to see the vibrant marine life up close. In the afternoon, visit the Samudrika Marine Museum to learn more about the region's ecology and history. In the evening, head to the nearby Chidiya Tapu Beach for a beautiful sunset.
Explore the ruins of Ross Island, which was once the administrative headquarters of the British Raj in the Andaman and Nicobar Islands. In the afternoon, head to the nearby North Bay Island for some snorkeling and water sports. In the evening, enjoy a seafood dinner at any of the local restaurants in Port Blair.
Take a day trip to Baratang Island to see the magnificent limestone caves and mangrove forests. After the tour, visit the Parrot Island to watch thousands of parrots gathering in the evening. Return to Port Blair in the evening for dinner and rest.
Take an early morning ferry to the beautiful Havelock Island and head straight to Radhanagar Beach. Spend the day relaxing on the pristine white sand and swimming in the turquoise waters. In the evening, take the ferry back to Port Blair.
If you have more time, consider visiting the Mahatma Gandhi Marine National Park for scuba diving or the Mount Harriet National Park for hiking. You can also take a day trip to the nearby Neil Island or explore the mangrove forests of Mayabunder. Make sure to try the local seafood delicacies like fish curry and lobster at any of the popular restaurants in Port Blair.