The county seat of Suffolk County, NY lies at the mouth of a river that flows into which body of water?
Peconic River The Peconic River is a river within Suffolk County on Long Island, New York in the United States. The river is located in the eastern end of Long Island. The Peconic River drains an area between the Harbor Hill and Ronkonkoma terminal moraines, and flows into Flanders Bay which in turn connects to Peconic Bay east of Riverhead.
Great South Bay Bridge The Great South Bay Bridge is a bridge on the southwest side of Suffolk County, New York, on Long Island. It connects the Robert Moses Causeway from Long Island's mainland over the Great South Bay, connecting to both Captree and Jones Beach Island. It serves as access via the Robert Moses Causeway to both of the downstream crossings, the State Boat Channel Bridge and the Fire Island Inlet Bridge, also leading visitors and on-lookers to either the Fire Island Lighthouse or the Robert Moses State Park. It is the second longest bridge in the New York State, behind only the Tappan Zee Bridge.