From GameWatcher: "Destiny 2 welcomes a new mini-game in the shape of simple treasure maps. Embracing the weekly reset of typical MMOs, these maps can be picked up and completed once per week and will award seemingly random goodies to those who do."
You get access to these without completing the main story.
I got a exotic Ingram out of one of them
I did to and I was like well, going to keep finding these. The next one, I only got a rare mod...
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