This article presents some photographic images from the first decades of the 20th century, made by different photographers, often unknown, in the frontier contexts. After the territorial annexation as a consequence of the War of the Pacific, the Andes world in Chile begins to take shape, reason why the photographic representations of the new inhabitants of the North of the country reflect the "chilenization" that was experienced towards the end of the 19th century and beginning of the 20th century. Even though at the end of the 19th century, there is a scarcity of photographs that give a testimony this cultural process, during the first decades of the coming century it is possible to find a significant number of photographic images. From these findings, it is possible to determine that the bordering processes are also expressed in the pictures, which recorded an early incorporation of the portrayed as partaking subjects of the new nation.