16 Rock Island (NY 23) latitude 44° 16' 50.4" N longitude 76° 1' 1.5" W October 3, 2009 Located in the Thousand Islands about 4.5 miles northeast of Clayton; Jefferson County; New York; off of Fisher's Landing. While only accessible by private boat; the grounds are open for touring and picnicking. ARLHS # USA-697
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