Jasenovac concentration camp
With the help of former U.S. Congressman Anthony Weiner, the New York City Parks Department, the Holocaust Park Committee, and the Jasenovac Research Institute created a public monument to the victims of Jasenovac in April 2005 (on the sixtieth anniversary of the camp's liberation).  Ten Yugoslavian Holocaust survivors were there, along with diplomats from Serbia, Bosnia, and Israel.  It is the only public monument to Jasenovac victims outside of the Balkans.  Ceremonies are held there every April.