There is a wire around manhattan what can be interpreted as a "fence" and it makes the whole area a "jewish home" so they are allowed to work there on Sabbath.
They made an area like this in every big city.
This is the dumbest shit ever.
https://theanthrotorian.com/culture/2017/5/24/the-eruv-did-you-know-theres-an-invisible-wire-hanging-above-manhattan