this level can be reached from the poolrooms, in this level you are in a farm with endless fields to harvest, the level is not truly endless, after a bit of walking you should reach concrete walls that are 30 meters high and can’t be climbed, the only way to leave is to find the train station close to the endless highway, you can’t go away using the highway cause the tunnels that pass through the concrete walls are sealed, while the tunnel for the railway is open but the rails are electrified so they will electrocute you if you pass over them, to leave you have to take the endless train that pass there sometimes, the ticket cost 2 coins and to gain those you have to harvest the crop in the farm, while harvesting entities might spawn and try to attack you, to avoid them you should run to reach the barn and close the doors. once you get the 2 coins you can use them at the station to buy a ticket for the train, there you can put the ticket into the machine and the train will bring you to other levels
more details: the train is guided by an entity of the backrooms but this one is not hostile, the train can travel through dimensions that means that potentially can reach various levels, if you look outside the window while the train travels you should be able to see the parts of other levels, like the skyscraper from the lv4 or the lv37