The cache is NOT at the posted coordinates. Although all caches appear to be hidden in the Great South Bay, they are not at these posted coordinates - no swimming is required to obtain any cache in this series 
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Welcome to the Geocachers of Long Island (GoLI) Geo-Art series.
The Geo-Art is modeled after the Montauk Point Lighthouse. It's the oldest lighthouse in New York State, authorized by the Second Congress, under President George Washington, in 1792. Construction began on June 7, 1796, and was completed on November 5, 1796. It is designated as a National Historic Landmark and still serves as an aid to navigation. And it's pictured on the GoLI logo.
This series is chock full of Long Island trivia, interesting facts, places, people and heritage. The questions are all multiple choice. If you're not sure of the answer, an internet search should make it easy. You can use the solution checker at the bottom of the page to confirm your answer. If you get it wrong, just try again. The hides are all very easy too, though are all hidden in residential neighborhoods. Please be stealthy, and if asked, explain honestly what you're doing. Once you find all 30, your Geo-Art reward will be completed. The caches are numbered in this series, the order that you find them is not important. Upon completion of this series, you will earn a GoLI Geo Art mini coin AND earn the GoLI Geo-Art souvenir to post on your profile! The link to the GoLI Geo-Art souvenir is on the cache page of Geo-Art cache page #30.
Question #13: Bridgehampton Race Circuit was an auto race track located near Sag Harbor, New York. The circuit opened in 1957, and was one of the first permanent road racing venues in the United States. In its early years, Bridgehampton was host to major international series, including the World Sportscar Championship, Can-Am, and NASCAR Grand National. Bridgehampton was renowned as a fearsome course, requiring the utmost of driver skill. By the early 1970s, the track was used mostly for amateur events and closed permanently in 1999. How long was Bridgehampton Race Circuit?
1.53 miles - N 40° 40.022' W 73° 25.366'
2.85 miles - N 40° 40.202' W 73° 25.663'
3.4 miles - N 40° 40.220' W 73° 25.636'