A pair of divers explore the wreck of the Giannis D (originally Shoyo Maru) on the Abu Nuhas reef, Strait of Gubal, Red Sea, Egypt. By British photographer Alex Mustard. He's travelled the world snapping pictures of wrecked ships lying on the sea bed.
Cold-water diving in California's Carmel bay is red-hot! Nutrient-rich waters from deep underwater canyons give the bay some of the best diving in the country. Here are the best spots to explore underwater.