The first two were the biggest, and were located at the tip of the largest estuary.

The river becomes a large estuary at the coast, where fresh- and saltwater mix.

It is the nation's largest estuary with a surrounding population of 15 million people in six states.

It is among the largest estuaries in the United Kingdom.

The lagoon area has a large mangrove estuary filled with bird wildlife.

It is the largest estuary in the United States.

It is the largest estuary on the north coast of Cornwall.

It has one of the largest non-firth estuaries in Scotland.

Most agree that valuable lessons can be learned from the multimillion-dollar effort to save the nation's largest estuary.

That is a common worry on the Chesapeake, at 64,000 square miles the nation's largest estuary.