Port Blair feels nothing like a tropical island town. Standing in its center feels like any other tumultuous Indian city. The prison is a relaxing gem.
Built in the opening of the 20th-century, the 698 cells of the British Cellular Jail radiate out from a central tower. Many Indian political prisoners suffered in the brutal conditions and it is a now a solemn memorial.
Little else in Port Blair draws attention of the tourist. The Anthropological Museum is weak.
A better alternative is chartering a taxi to Mt. Harriet via the Bamboo Flat Ferry. A stop at the Forest Museum & Chatham Saw Mill by the ferry is possible. The ferry is a kaleidoscopic experience. Mt. Harriett is known for its bay and lighthouse, featured on the 20 rupee note. The park itself has muddy trails with few views beyond think jungle.
Port Blair and Mt Harriet are good options to fill in travel days since all flights are daytime, leaving awkward, spare half-days.