A diver destination is a place where people can go to explore the underwater world. REEF (4 letters) is a term used to describe a large area of coral, rocks, and other marine life that form an underwater ecosystem. AUK (3 letters) is a type of seabird that is found in the northern hemisphere. LOON (4 letters) is another type of seabird that is found in the northern hemisphere. Scuba (5 letters) is an acronym for self-contained underwater breathing apparatus, which is a type of equipment used by divers. HELL (4 letters) is a term used to describe a deep ocean trench or canyon. All of these places are popular destinations for divers looking to explore the depths of the ocean.