In a small bowl stir together graham cracker crumbs, cinnamon, and sugar. Add melted butter. Press into bottom of a 10 inch springform pan. Set aside.
Preheat oven to 350°F. In a large bowl beat cream cheese, sugar, and flour until smooth. Add eggs one at a time. Beat well after each one. Add whipping cream, lemon and orange peel, vanilla, and sour cream. Beat well, scraping down bowl. Put springform pan onto a cookie sheet. Pour mixture into prepared pan.
Bake at 350°F for 15 MINUTES ONLY!!! Then reduce heat to 200°F. Bake for 1 hour and 20 minutes. DO NOT OPEN OVEN WHILE BAKING. Turn off oven and leave cheesecake in oven for 30 minutes. Cool cheesecake in pan. Refrigerate when cool.