Placencia Lagoon is the quieter side of the peninsula, a mangrove and seagrass world behind the beach. Kayak trips and small-boat tours look for manatees, crocodiles, dolphins, and birds, though sightings depend on tide, weather, and patience.
The lagoon is a useful correction to Placencia's resort image. It reminds you that the peninsula is part of a living coastal ecosystem, not just a strip of sand.