When Hitler invaded Czechoslovakia in 1939 (the Munich Agreement, Chamberlain and all that), he of course wanted to send all the Jews to the concentration camps. He stole and/or destroyed Jewish synagogues, properties etc, but he never touched the Old Jewish Cemetery of Prague. He said he wanted to preserve it - and turn it into a museum of European Jewry.
Ironically - even sinisterly - it HAS been turned into a museum already. Entry into the burial ground of, among 100,000 others, Rabbi Loew (of Golem fame), sets you back with 20 euros. The cemetery has been cleaned up, black-clad security guards and all, but I fear some of its erstwhile atmosphere of poignant abandonment in the middle of a bustling city has been lost.