Question: Where in New York is the highway that ends at the toll barrier for Heckscher State Park in Great River?
Sentence (from "Heckscher State Parkway"): The parkway, located entirely within the Suffolk County town of Islip, begins at the south end of the Sagtikos State Parkway in West Islip, from where it continues west as the Southern State Parkway.
Relevant evidence: No