With a population of about 477,377, Staten Island is sometimes called "the forgotten borough," as it is less well-known than other boroughs, namely Manhattan, Brooklyn, Queens and The Bronx. While Staten Island may not have the claim to fame of other boroughs, the Staten Island Ferry is a large tourist attraction and thus provides out-of-towners with some frame of reference for Staten Island. It is the third largest borough in area at 59 sq. mi. (approx. 153 km²).