One of the major gameplay changes introduced with Animal Crossing: New Horizons are mysterious islands accessible only through Nook Miles. These smaller deserted islands exist to let players gather up additional resources that'll help fuel the development of their island community and home, but you're never quite sure what you'll find. Naturally, the Animal Crossing community has come up with a way to help you know what you're in for right after your seaplane has touched down.
Most Nook Miles islands basically offer up more fruit, fish, bugs, and crafting materials, while a few rare variants present particularly lucrative opportunities. These rarer islands always come with a different layout, which is why this new Mystery Islands Map posted to the Animal Crossing subreddit comes in handy.
It might not take long to figure out what kind of semi-random island you've landed on, especially if there's a bounty of non-native fruit before you, but these maps should take out most if not all of the guesswork. For instance, a Nook Miles trip to an island with rocks that only release Bells will always feature a smaller island ringed by a moat in the middle.
Islands with Bell-only rocks aren't even the best way to pay off those loans. For that, you'll want to end up on an infinite tarantula island. The creepy, furry spiders can be tricky to catch, but if you fill up your inventory with them, they'll each get you 8,000 Bells from the Nook brothers at point of sale.
If you're looking to get a full selection of fruit growing on your island, you'll need to dip a toe into multiplayer. Those fruit islands you can pull with a Nook Miles ticket will only ever get you the same non-native fruit, which is always a windfall but less helpful once you've already got a secondary grove going. Maybe with upcoming timed events like Bunny Day and Earth Day you'll have an opportunity to earn other fruits another way, but even without time travel shenanigans benefitting you, playing Animal Crossing with friends is a big help in building out your island quickly.
For more on Animal Crossing: New Horizons, head over to our guides hub.