Ponár (Polish Ponary, Lithuanian Paneriai) is the mass murder site outside Vilnius where around a hundred thousand civilians were murdered by the Nazi regime. Some 70,000 of them were the Jews of Vilna and its region.
Before the war the site was known as a bucolic holiday and picnic spot set in the forest. During the year-long Soviet rule in 1940-1941, large pits were dug for an oil storage facility. After the Nazi invasion the site was converted to a mass murder operation with the ready-dug pits serving as mass graves.