N.Y. Real Property Actions & Proceedings Law § 522

§ 522. Essentials of adverse possession not under written instrument\nor judgment. For the purpose of constituting an adverse possession not\nfounded upon a written instrument or a judgment or decree, land is\ndeemed to have been possessed and occupied in either of the following\ncases, and no others:\n 1. Where there have been acts sufficiently open to put a reasonably\ndiligent owner on notice.\n 2. Where it has been protected by a substantial enclosure, except as\nprovided in subdivision one of section five hundred forty-three of this\narticle.\n