Here is one on Fatima that is quite good.
arguingwithatheists.com/Pages/Modern_Miracles_Fatima.htm
In addition I would like to say that often it is mentioned that Catholics do not have to believe in Fatima. Technically yes, but care in explaining this should be given. All the faith and morals, divine revelation, necessary for our salvation has stopped after the last apostle died and there will be no more. Everything we need to know for salvation is in Tradition and the Bible with the Church’s guidance in them. But there are some things in private revelations that are new and important for our future and are given for our further guidance in living in this world. And also things that will help improve the lives of many many people, not only in their bodily health, but more importantly in their spiritual well being. Many people have been drastically changed forever for the better. And because of this the wold itself will become a better place.
When the Popes have visited these places, and the church makes saints of those involved in these events, then we should say there is truth in what that event is saying to us and to the world, and could help save souls. This is something to bear in mind, the well being of others who were helped. It is Jesus who said to Peter, “strengthen your brethern in their faith.” These events do just that, because many people have found faith, have regained faith, and have a renewed faith thru these saints who were involved saw what they saw to bring us help from above that sometimes eludes us. I know it has helped me from time to time, and I know of others it has also helped, a light in the night given to us that others do not have. I think we are on safe ground when the church takes a day to offer a special
Mass in their celebration, and made saints of those who saw a heavenly vision. The scapulars and miraclous medal fall into the same category. If we say we can just easily ignore them as they came after the full revelation, would be to throw away the words of our Lady as unimportant when the church herself has approved these things in many ways. Mary is always thinking of our welfare and from time to time comes to us in a special way to encourage and strengthen us to pull us toward her Son. What other saint has thought so much of us that they appeared as often to help and encourage us? She has a real message, an important message, which the church has approved as safe. Should we think it otherwise?