If I was Otto Frank I would have returned to the hiding place. The main reason why is because all of his family has been killed in the concentration camps and that is were he saw his family for the last time. Also his last memories of them Were in that building. Another reason is that he could have looked for remainders of their things to remember them by. The most important reason of his going back is to find Anne's diary, which he does finds. This is very important because it document all the hardships they went through while in hiding it also has many memories from when his family was altogether.There are many reasons for him to never go back considering how horrible it was. But I support Mr.Frank decision to go back to remember his family and to get Anne's diary.