The Urban Assembly New York Harbor School, also called the Harbor School, is a public high school located on Governors Island. This school is unique in New York City, which has 538 miles (866 km) of waterfront, in that it attempts to relate every aspect of its curriculum to the water. The school is part of the Urban Assembly network of 21 college-prep schools in New York City. A stated focus of the school is to continue to work with organizations such as Waterkeeper Alliance and the Governors Island Alliance to ensure the improvement and restoration of New York City's harbor.