There are a total of 15 Criptograma Chests and 30 Criptograma Charts in Far Cry 6. Criptograma Chests get marked on the map as you get near it. To open a Criptograma Chest you will need to find 2 Criptograma Charts nearby, which act as keys to open the chest. On opening the chest you will find a Piece of Armor.
Near the Charts, you will find a blue marking pointing towards it. There is also a wind chime near the chest and charts. You can follow the noise of the wind chime to locate them. This article shows the location of Criptograma Chest & Criptograma Charts in the Costa Del Mar region of Madrugada.
Costa Del Mar Criptograma Chest 1/2 and Criptograma Charts #10 & #25
The Criptograma Chest is on the western coast of Poesia in the Costa Del Mar region of Madrugada at the location as shown in the picture below.
Criptograma Chart #10: The first chart is behind the big rock in the water west of the chest location as shown in the picture below.
Criptograma Chart #25: From the previous chart location, follow the blue markings and go south. Stop near the signboard as shown in the pictures below. Climb up the mountain near the signboard (See the third picture below). As you climb the rocky mountain, the chart will be right in front of you.
Costa Del Mar Criptograma Chest 2/2 and Criptograma Charts #03 & #22
The Criptograma Chest is on the top of a small tower in El Dorado Cabins in the Costa Del Mar region of Madrugada as shown in the picture below. You can get to the top of the tower using your grapple hook.
Criptograma Chart #03: From the chest, take the path southeast as shown below. This will lead you to a small landmass on water, with the chart on a rock as shown below.
Criptograma Chart #22: From the previous chart, follow the blue marking to the southern tip of the coast, where you will find the chart on the mountain wall as shown below.