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Excursions to the ravine had already been held before, but the official opening was on January 27, the anniversary of the Auschwitz-Birkenau concentration camp's 1945 liberation (later designated International Holocaust Remembrance Day).
On 25 January 2011 at the European Parliament in Brussels on the eve of the International Holocaust Remembrance Day there took place a commemoration meeting devoted to the memory of the Holocaust.
In a speech issued on 27 January 2012 on the occasion of International Holocaust Remembrance Day Prime Minister of Norway Jens Stoltenberg issued an official apology for the role played by Norwegians in the deportations.