It would have to Andersonville during the American Civil War.
The horrors of Andersonville were essentially incomparable with any other wartime prisons during the civil war. The war crimes committed in the prison were so severe that the warden was put to death for his brutality after the war.
camp rock!
a concentration camp.
Van Buren Youth Camp (VBYC), located in Van Buren.
Auschwitz Death Camp
Auschwitz was an extermination camp that killed the most people.Dachau was the first concentration camp.
The most well known prison in Dublin is Mountyjoy prison. There are other smaller prisons and some historic ones. Kilmainham Jail is a historical prison, that no longer has prisoners and is now a tourist attraction because of its history. It is the most famous historic prison in Dublin.
Andersonville, in west-central Georgia. I don't know if it's the worst but it was really bad and is famous for being terrible. The commander of that camp was hanged after the war for the terrible and neglectful treatment of the Union prisoners, most of whom died within months after arriving there.
Probably the Jonas Brothers.
One of the most famous concentrations camp was at Auschwitz
There are many but the most famous one is in Hunstville, Alabama.
They were not the same, but they were the most famous camp in their respective roles.