Containing the world's largest repository of information on the Holocaust, Yad Vashem is a leader in Holocaust education, commemoration, research and documentation. Located in Jerusalem, Israel, Yad Vashem's 45 acre campus comprises museums, exhibitions, memorials, sculptures, gardens, and world class research and education centers. Millions each year access Yad Vashem's vast resources in order to study, teach and commemorate the Holocaust.
http://www.yadvashem.org (less info)