Harley Reef is a beginner-friendly breakwater wall dive in Apra Harbor, known for a shallow top, a long sloping reef, and the Harley motorcycle resting near the top of the wall. It is a relaxed site for slow sightseeing and buoyancy practice, with turtles often part of the draw and the deeper slope giving more room to wander. Clear water and a calm plan make it more rewarding than trying to rush it.