N.Y. CPL Law § 270.50

§ 270.50 Trial jury; viewing of premises.\n 1. When the court is of the opinion that a viewing or observation by\nthe jury of the premises or place where an offense on trial was\nallegedly committed, or of any other premises or place involved in the\ncase, will be helpful to the jury in determining any material factual\nissue, it may in its discretion, at any time before the commencement of\nthe summations, order that the jury be conducted to such premises or\nplace for such purpose in accordance with the provisions of this\nsection.\n 2. In such case, the jury must be kept together throughout under the\nsupervision of an appropriate public servant or servants appointed by\nthe court, and the court itself must be present throughout. The\nprosecutor, the defendant and counsel for the defendant may as a matter\nof right be present throughout, but such right may be waived.\n 3. The purpose of such an inspection is solely to permit visual\nobservation by the jury of the premises or place in question, and\nneither the court, the parties, counsel nor the jurors may engage in\ndiscussion or argumentation concerning the significance or implications\nof anything under observation or concerning any issue in the case.\n