In Red Dead Redemption 2, you can collect all sorts of treasures. They are usually marked on special maps. You can find one type of treasure thanks to the Jack Hall Gang map. On this tutorial page, you will find detailed information on how to get this map and the location of each treasure.
How do I get the first map?
The man selling the map can be found at the Dakota River. He will stand upstairs and offer you a map for $5. If you scared him off or killed him, he will not be there.
You can also buy the map from the Fence. It costs about a dollar there.
The First Map
The first map will direct you to the next one. To get it, you have to go to Caliban's Seat. This place is under Valentine.
To get the map you must first climb up the very top. The road is not as steep as it seems - you can freely run on it.
At the top, turn left. There is a path which you can take to easily descend to the rock shelf.
Be careful not to slip off the rock shelf. On your way there will be a larger rock, go over it to the other side.
At the end of the rock shelf, you will find a small hole in the rock. Search it and you will find the next map.
The Second Map
The second map will direct you to Cotorra Springs.
In this area, you will find several large rocks. There is a hole in one of them. Search it and take the next map out of it.
The Third Map and Prize
The third map will take you to O'Creagh's Run. This place is located in Grizzlies East.
In the middle of the lake, there is a small rocky island, swim to it.
On the shore of the island, there is a small hole in the rock. Search it, you will get 2 bars of gold from it. Sell them at the Fence and you will earn 1000 dollars.