I want to know the answer to the following question:
What is unique about the Bronx's location?
All the background I'm provided with is that "Of the five boroughs, the Bronx is the only one on the U.S. mainland and, with a land area of 42 square miles (109 km2) and a population of 1,438,159 in 2014, has the fourth largest land area, the fourth highest population, and the third-highest population density.". Is that enough to answer the question?