Complex sentence: Fifteen miles north of Manhattan, in Westchester County, the NYAC boasts a 30 acre facility-Travers Island-that offers amenities for tennis, swimming and boating, field sports plus many other outdoor activities.
Split into simpler sentences: Fifteen miles north of Manhattan, in Westchester County, the NYAC has a 30 acre facility on Travers Island. It offers tennis, swimming and boating, field sports and many other outdoor activities.