https://www.gamespot.com/articles/fortnite-where-are-vending-machines-map-locations-/1100-6457935/

Fortnite updates continue to rapidly roll out, and one of this year's additions to Battle Royale came in the form of Vending Machines. If you're able to find one, you can trade in building materials you've gathered in exchange for a variety of items, which vary from machine to machine. You'll often find these in the same spots, but they are not fixtures. With Season 4's Week 5 challenges tasking you to use one once again, we've detailed the common locations and where to find them, as well as exactly how they function and what prices are like.

In terms of finding the Vending Machines, they're scattered all across the map, but they don't always appear in the same spots. You can see what it's like to interact with some in the video above, and we've also compiled the map you see above, which combines the discoveries of Reddit user clizzythegod with those we've found ourselves. As you'd expect, you'll most easily find Vending Machines in high-density areas like Pleasant Park, Tilted Towers, Salty Springs, and Retail Row, but there are others in unnamed parts of the map.