The Murud Janjira Fort in Maharashtra is considered to be the mightiest marine fort in Indian history. The indomitable fort remained invincible until it became a part of India after Independence from the British.
Repeated attempts by the British, Portuguese and Marathas at invading the fort bore no fruit and they had to turn back disheartened.
The fort is especially famous for its 3 gigantic cannons that were a terror in the surrounding seas for their extremely long range.
At the peak of its might, the fort had an astounding 572 cannons guarding all of its sides.