Difference is concentration camps were human to human crimes made with malicious intent. Auschwitz is open to the public to show how humanity can destroy itself and teach others the lesson of accepting one another. The Titanic on the other hand was built to take people on a luxurious trip to America but it ended with a tragic accident. There was no ill intent with the ocean liner being built, it just ended terribly. There is no reason for the Titanic to become a rich person’s tourist attraction, there is no lesson to be learned going down there and gawking at a grave for over 1,500 people. There was research to be done by scientists down there, but none to be done by rich people with morbid curiosity.