What is the name of the only "Des Moines" cruiser that still exists?
United States Naval Shipbuilding Museum: The United States Naval Shipbuilding Museum is a private non-profit museum in Quincy, Massachusetts featuring USS "Salem" (CA-139), a heavy cruiser docked at the former Fore River Shipyard where she was laid down in 1945. USS Salem (CA-139):  Commissioned in 1949, she was the world's last heavy cruiser to enter service and the only one still in existence.
USS "Salem"