Mexican Immigration, particularly illegal immigration, is a topic that has always been a pressing issue in the American society. Especially in present times, the topic polarizes more than before under the current presidency of Donald Trump. Newspapers and websites provide images and photographs of Mexican immigrants nearly day by day. This work has primarily dealt with the area of photography. The focus of it is on documentary photography and photojournalism in context with the topic of illegal immigration. Selected photographs from John Moores photo series El Norte: Migrating to America, taken at the border between Mexico and the United States of America, have been analyzed. With respect to this, Gillian Roses visual methodology has been applied to the photographs to be able to analyze an image according to its four specific sites. This work tries to show how photographs open the view to social and cultural factors through this methodology, while the context of documentary photography and photojournalism is always included at the same time. It answers questions, such as how existing social and cultural aspects can be recognized in photographs and how visual effects and their influence on the spectator can be referred to each other. While doing so, ethnicity plays an important role. This work demonstrates that ethical doubts arise primarily at the first glance at an image. Nevertheless, it is the duty, especially when one captures photographs reflecting on immigration issues, to make the viewer aware of the presented scene and not to imagine to be put in this position oneself. Therefore, this diploma thesis also deals with the viewing point of the spectator, the theme of asymmetrical reciprocity and connects these to documentary photography.