R.M.S. Titanic

The fourth funnel of R.M.S. Titanic was fake. It was placed there for two reasons. Aesthetics was one reason. At the time it was a common belief that a ship with more funnels was a faster ship. Thus the fourth (fake) funnel gave an impression of innate speed. While not an actual funnel, the fourth funnel had piping to allow for the ventilation of ship's cooking stoves.