What might be a geographic signature of New York city?

The Hudson River is a geographic signature of New York City. The river flows through the heart of the city, and its waters have been a vital part of New York City's history and economy. The Hudson River has been used for transportation, trade, and recreation, and it has been the inspiration for countless works of art and literature. The Hudson River is also home to a variety of wildlife, including fish, birds, and marine mammals.