Ross Island, a small island located near Port Blair, was fortified by the British in the 18th century to serve as a strategic defense point.

The Cellular Jail, also known as Kala Pani, is a historical prison located in Port Blair, infamous for its harsh conditions and solitary confinement cells.

None of the forts mentioned were constructed by the Marathas in the 18th century.

Raj Niwas, located in Port Blair, served as the residence of the Chief Commissioner during the British colonial period.

Viper Island, a small island near Port Blair, was used as a penal colony by the British, housing prisoners and convicts.

Ross Island Palace, located on Ross Island, was the residence of the Lieutenant Governor during the British colonial period.

North Sentinel Island, located in the Andaman and Nicobar Islands, was fortified by the British in the 19th century to protect the entrance to Port Blair.

Cellular Jail Palace, located within the Cellular Jail complex, was the residence of the Superintendent of the Cellular Jail.

Ross Island, located near Port Blair, was fortified by the British in the 19th century to protect the harbor of Port Blair.

Raj Niwas, located in Port Blair, served as the residence of the Chief Secretary during the British colonial period.

Viper Island, located near Port Blair, was fortified by the British in the 19th century to protect the southern entrance to Port Blair.

Raj Niwas, located in Port Blair, served as the residence of the Commissioner of the Andaman and Nicobar Islands during the British colonial period.

North Sentinel Island, located in the Andaman and Nicobar Islands, was fortified by the British in the 19th century to protect the northern entrance to Port Blair.

Cellular Jail Palace, located within the Cellular Jail complex, was the residence of the Superintendent of the Andaman and Nicobar Islands.