Anniversary ideas ??

My boyfriend and I are having our 4 year anniversary in less than a month and I honestly want to make it really special for him. He always does everything for it every year, plans everything, does his best to make me happy ( he succeeds 24/7) and makes everything about me so this year I really want to make it special and make the weekend memorable with it mostly being about him and our 4 years together. i just don’t know what to do!!? Any ideas will be much appreciated! 💋💋💋💋