I don't enjoy concentration camps, but it was a good article, I have visited:
Auschwitz
https://en.wikipedia.org/wiki/Auschwitz_concentration_camp
and
https://en.wikipedia.org/wiki/Poston_War_Relocation_Center
The Poston Internment Camp, located in Yuma County (now in La Paz County) of southwestern Arizona, was the largest (in terms of area) of the ten American concentration camps operated by the War Relocation Authority during World War II.
/FF