Hello! The sentence in itself is correct but you might want to simplify this a little but switching the order around so, something like "Through many years of traveling, I have developed a good instinct about which places are safe and which are not." This is a little easier to read/understand but very good first attempt! I hope this helps and, if you are looking for a tutor to improve your English, I am now available for lessons. Have a lovely day! Roberta