The Dive Shop, Memphis

The Dive Shop's instructors, drawing from Scuba Schools International's programs, teach water-safety skills to fledgling divers and swimmers of all ages. Classes and activities range from the Scuba Rangers club—where kids aged 8–12 learn to snorkel and scuba dive from the safety of a pool—to open-water dives, swimming lessons, and more advanced stress-and-rescue dive sessions, during which instructors turn dog paddlers into almost-mermaids, minus the pet octopuses.