Anachronism. Father Salvatore Anastasia's trip to NY is supposed to have taken place in the late 1950's (Albert Anastasia was killed in 1957), whilst Alberto Sordi from the ship is staring the Manhattan skyline with the WTC and Twin Towers which were built between 1960 and 1972.
Italian FIAT 682 truck in the background of the scene of dead bodies recovery from the port waters shows that it was shot, probably, in Naples.