Do more than look at a reef — help build one. In two and a half hours on the Gulf of California, you'll learn how coral fragments are grown, plant one yourself in the nursery's incubation beds, and then snorkel over the beds and the adjacent natural reef with a marine guide. Small groups, full gear included, and only 20 minutes from downtown La Paz. A short, hands-on activity that fits alongside a beach day or a full-day island tour.