There weren't camps located in a location called "concentration." They were called concentration camps, and they were located all over Europe.
All camps were technically concentration camps, generally the extermination camps were called 'death camps'.
Concentration camps :)
Nazi prison camps were called concentration camps.
=== === They called them Konzentrationslager.
There were concentration camps in the Holocaust. The concentration camps were basically work/death camps.
This was called a creamatorium