This is a Koch Snowflake. You draw a triangle, then you split each line into thirds and with the middle third you draw a new equilateral triangle. then rinse and repeat.
Something cool about it is, because of the way it’s designed, it’s a finite area bound by an infinite perimeter!
Countries also have a fractalish nature, take a look at a global map, then at much closer coastline map and see the ever increasing complexity.