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The original was posted on /r/todayilearned by /u/IkyGreenzOG on 2024-01-10 05:17:41+00:00.

Original Title: TIL a clear fishing wire is attached to posts surrounding the entire perimeter of Manhattan. From 1st Street to 126th. This string is part of an Eruv, a Jewish symbolic enclosure. Many observant Jews in Manhattan rely on this string to leave the house on the Sabbath.