Easy "Como Te Llama" Achievement
You can find five llamas in The Hidden City (Paititi). One is in front of "Unuratu's Home" base camp. One is close to it at the hillside (corner of the map). Two are at the market square in town. Another is between the houses, up the hill southwest of the market square. You can also find two of them in the "Mission Of San Juan" area in the stables. Press Y (Xbox controller) to pet them. It has to be five different llamas to get the "Como Te Llama" achievement.