What’s the eruv of Manhattan? Well according to the article below:
The eruv encircles much of Manhattan, acting as a symbolic boundary that turns the very public streets of the city into a private space, much like one’s own home. This allows people to freely communicate and socialize on the Sabbath—and carry whatever they please—without having to worry about breaking Jewish law.
Here’s a map of it:
You might think that it is hard to believe such a thing could last for long, but as this piece shows, it is diligently maintained.
I found this fascinating. There’s many interesting aspects of New York, but this is one of the better ones. For more on this, read: There’s a Wire Above Manhattan That You’ve Probably Never Noticed