Top 5 Mistakes in Titanic!
1)The lake that Jack told Rose he went ice fishing on when she was threatening to jump is Lake Wissota, a man-made lake in Wisconsin near Chippewa Falls (where Jack grew up). The lake was only filled with water in 1918 when a power company built a dam on the Chippewa River, six years after the Titanic sank.
2)In the beginning of the film, when Jack is running to the boat on the pier, his rucksack is a Swedish Army rucksack, model 1939, and nowadays widely sold as army surplus.
3)After being shot at by Cal, Rose and Jack race down the hallways outrunning the rising water. Rose is wearing white sneakers, yet she is seen two minutes later wearing period shoes when Jack retrieves the gate key that the crewman dropped beneath the rising water.
4)When Rose is arriving in New York half asleep, she looks at the Statue of Liberty, which is the same colour as now (green). But if you visit the Statue of Liberty, you'll find a plate telling you that the original color was brown, and it took over 35 years for it to change colour. The Statue of Liberty was placed there in 1886, so in 1912 it should have still been partly brown. Also, the flame was replaced in 1986 (for its 100th anniversary) with a gold flame. The film shows the Statue holding a torch with a gold flame, not the original.
5)Rose mentions Austrian psychoanalyst Sigmund Freud's ideas on the male preoccupation with size to Bruce. However this is 1912, and Freud did not publish the work relating to this until 1920 in "The Pleasure Principle." Also, up until 1919, Freud relied solely on data from females.
There are over 200 mistakes in that movie, you can find more mistakes if you just google. I just decided to list a few of them. Although that movie had many mistakes, it surely still one of the best romance movies in history.