The Cellular Jail, also known as 'Kālā Pānī', was a British colonial prison in the Andaman and Nicobar Islands. The prison was used by the colonial government of India for the purpose of exiling criminals and political prisoners. Many notable independence activists, including Sardar Singh Artillery, Diwan Singh Kalepani, Yogendra Shukla, Batukeshwar Dutt, Shadan Chandra Chatterjee, Sohan Singh, Vinayak Savarkar, Hare Krishna Konar, Shiv Verma, Allama Fazl-e-Haq Khairabadi, and Sudhanshu Dasgupta were imprisoned here during the struggle for India's independence. Today, the complex serves as a national memorial monument.

The Andaman and Nicobar Islands is a union territory of India. It consists of 836 islands grouped into two island groups: the northern Andaman Islands and the southern Nicobar Islands, separated by a 150 km (93 mi) wide channel. Port Blair is the capital and largest city of the territory, located about 1,190 km (740 mi) from Chennai and 1,255 km (780 mi) from Kolkata in mainland India. The islands are sandwiched between the Bay of Bengal to the west and the Andaman Sea to the east with the northern-most point located 901 km (560 mi) from the mouth of Hooghly river. Indira Point at 6°45’10″N and 93°49’36″E at the southern tip of Great Nicobar is the southernmost point of India.