Praslin and La Digue give you one of the easiest multi-island dive and snorkel combinations in Seychelles. Base on Praslin for airport access, more dive boats, and day trips to Curieuse, St. Pierre, and Iles Cocos, then switch to La Digue for a slower rhythm, bike-based exploring, and dramatic beaches like Anse Source d'Argent. Underwater, the signature is granite: boulders, channels, swim-throughs, and reef slopes with turtles, rays, reef sharks, octopus, and seasonal pelagic surprises. Conditions are best in the lighter-wind transition months, while June to August needs more care around exposed sites. Above water, you can pair dives with the Vallee de Mai, giant tortoises on Curieuse, and the Veuve Reserve's black paradise flycatcher.