Lest we forget

Rico says that, when he was in Berlin, some forty years ago now, he saw a sign that read Lassen wir vergessen, which translates to the post title, and under the sign was only part of this list (and, if you don't know what they are, you really need to study some history):

Czechoslovakia
Sered

England
Alderney

France
Malines
Drancy
Fresnes
Compiegne

Germany
Dachau
Ebensee
Jungfernhof
Ravensbruck
Kulmhof
Sachsenhausen
Dora-Nordhausen
Mauthausen
Hartheim
Buchenwald
Sonnenstein
papenburg
Flossenburg
Oranienburg
Theresienstadt
Landsberg
Stutthof
Neuengamme

Greece
Salonika

Holland
Amersfoort
Westerbork
Esterwegen
Vught

Hungary
Kisvárda

Italy
Ferramonti
Bolzano
Fossoli

Latvia
Riga

Lithuania
Kovno (Kaunas)

Other countries
Koberi
Gurs
Baerum
Berchad
Lieberose
Csepec
Zlinia
Natzweiller
Vaivara
Brezdonk

Poland
Lublin
Lwow
Warsaw
Auschwitz
Treblinka
Grossrosen
Birkenau
Lodz
Belsen
Majdanek
Chelmno
Plaszow
Sobibor
Jasenovac
Cracow
Belzec
Vilna
Janowska