For a diver from the deserts of Arizona, there is a special connection to the Red Sea. Flanked by the vast, arid landscapes of Egypt and the Arabian Peninsula, its shimmering blue waters hold a secret world. For millennia, this has been one of the most critical shipping lanes on the planet, a bustling highway of commerce and conflict. And where there are ships, there are shipwrecks. Today, these sunken ghosts have been transformed, evolving from maritime tragedies into breathtaking artificial reefs and the world’s most spectacular underwater museums.