The Nazi camp system was vast and varied.
Map of the major Nazi concentration and extermination camps / USHMM
Some camps served as penal colonies for those defined as "enemies of the state."
The electrified barbed-wire fence, moat, and watchtower at Dachau, 1945
Forced-labor camps were designed to exploit prisoners for SS and private German industries, often working the prisoners to death.
Prisoners working a construction site in a Bulgarian labor camp, 1943 / USHMM
At Nazi killing centers, victims were murdered in gas chambers and their bodies disposed of either in mass burial pits or by burning them in specially designed crematoria or mass pyres.
The main gate of Auschwitz with the motto "Arbeit Macht Frei" (Work makes one free), 1945 / USHMM