The Map of the World
Metal can rust over time, especially when it’s kept outside and exposed to the weather. Rusting is part of the aging process for metal, but it can become a hassle in some cases. This is just another example of a metal that has rusted over time.

Source: Reddit
But this rust is a little stranger than most. After all, there aren’t many rust patterns that create a nearly accurate portrayal of a world map. You almost have to question whether someone helped carve it into this layout before this photographer discovered it because it’s that good.