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.
You will find blue markings pointing towards the charts. 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 Chests & Criptograma Charts in the Esperanza region.
Esperanza Criptograma Chest 1/2 and Criptograma Charts #08 & #15
This Criptograma Chest is at the highlighted location in the Esperanza region.
Criptograma Chart #08: Grapple up to the ledge on the left side of the chest. Climb up the ladder on the ledge to reach the upper level. Jump down to the next rooftop as shown below. Here you will find chart #08 on the wall.
Criptograma Chart #15: On the right side of the chart you will see a zipline. Use the zipline to reach the building on the west side as shown below. Climb the vines here, to reach the rooftop. Here you will find chart #15.
Esperanza Criptograma Chest 2/2 and Criptograma Charts #02 & #11
This Criptograma Chest is on the rooftop north of the La Divinidad Cathedra in the Esperanza region as shown below.
Criptograma Chart #11: This chart is on the balcony of the cathedral. To reach there, Jump on the roof at the right side of the chest and then continue south on the roof. Then jump from the ramp to reach the cathedral balcony as shown below.
Criptograma Chart #02: Enter the cathedral through the door on the balcony where you got the previous chart. Exit the cathedral from the door on the east side of the same floor as shown below. Here you will see a ramp. Use the ramp to jump to the roof of the building further east. On this roof, you will find the chart.