There is a city that stops for one minute every year

Once a year on august 1st, the people of Warsaw pay hommage to the fallen heroes that fought for freedom in 1944 during the Warsaw Uprising. The biggest rebellion against German Nazi occupation during WWII cost over 200 000 lives and destruction of the capital.

More info:
http://en.wikipedia.org/wiki/Warsaw_Uprising
http://www.1944.pl/en/
http://www.warsawuprising.com/