Some of the best snorkeling and diving in the world is found at the southern tip of the Sinai Peninsula. Here, on a slender promontory where the Gulf of Aqaba meets the Straits of Tiran, Sharm el Sheikh offers access to serene sand beaches, wind-carved cliffs and a wonderland of colorful fish and coral reefs. The area is revered as a place of prophets and miracles, including St. Catherine's Monast…