The largest bay in the world is the Bay of Hudson, located in northeastern Canada. It spans approximately 1.23 million square kilometers (around 475,000 square miles) and is characterized by its vast, shallow waters. Hudson Bay is not only significant for its size but also plays a crucial role in the region's ecology and economy. It serves as a habitat for various fish and marine species, and its surrounding areas are rich in wildlife, including polar bears and migratory birds. The bay has historical importance as well, having been a central part of early European exploration and trade in North America.