Babi Yar monument

Babi Yar or Babyn Yar is a ravine in the Ukrainian capital Kyiv and a site of massacres carried out by Nazi Germany's forces during its campaign against the Soviet Union in World War II. The first and best documented of the massacres took place on 29–30 September 1941, killing some 33,771 Jews. Other victims of massacres at the site included Soviet prisoners of war, communists and Romani people.

Source: Wikipedia