Explanations:The Cellular Jail, also known as Kala Pani, is a historic prison located in the Andaman and Nicobar Islands. It is the most well-known building in the region due to its historical significance as a place where Indian freedom fighters were imprisoned during the British colonial era. The jail was constructed in the late 19th century and was designed to isolate prisoners from each other, with each cell having its own window and door, hence the name "Cellular Jail." The prison was notorious for its harsh conditions and the brutal treatment of prisoners, many of whom were political prisoners fighting for India's independence from British rule.
The Cellular Jail has become a symbol of the Indian struggle for freedom and is now a national monument and museum. It attracts a large number of visitors each year, both tourists and those interested in the history of the Indian independence movement. The jail's architecture and the stories of the prisoners who were held there make it a significant landmark in the Andaman and Nicobar Islands.
Marina Park, while a popular tourist destination, is not as historically significant as the Cellular Jail. It is a recreational area that offers scenic views and is a place for leisure activities, but it does not hold the same historical importance as the Cellular Jail. Therefore, when considering the most well-known building in Andaman and Nicobar Islands, the Cellular Jail stands out due to its historical significance and its role in the Indian freedom struggle.