The Bay of Bengal is the largest bay in the world. A northern extension of the Indian Ocean, the bay is bordered by Burma on the east, Bangladesh on the north, and India and Sri Lanka on the west.
The bay is approximately 1,000 miles wide, according to WorldAtlas. The maximum water depth is recorded at 15,400 feet, but the average depth is approximately 8,500 feet.
Plate tectonics account for the formation of the Bay of Bengal. This sub-continental clash of plates is an active force today and results in the Bay of Bengal's reputation for underwater earthquakes and tsunamis, according to National Geographic.