Lourdes, becasue of just HOW MANY miracles are attributed to it.

Fatima because I don’t think thousands of people would lie about seeing the sun move.

Medjugorie because not only did it deeply affect and imrpove the Faith of MANY of my family members, but the Miracles associated with it are also rather convincing. I have even seen a tape where the sun dissapears for a moment. I know that sounds a little far-fetched but it is true.