Expedition Day 4: Golfo Dulce, Costa Rica Enter the mangrove-fringed Golfo Dulce along the southwestern edge of Costa Rica as our nimble expedition ship takes us into the remote upper reaches of this placid bay. Exploring by Zodiac, paddleboard and kayak, we encounter Pacific Costa Rica’s dazzling avifauna as we watch for golden-hooded and Cherrie’s tanagers, yellow-throated toucans, fiery-billed aracaris and crimson-fronted and orange-chinned parakeets, constantly chattering in flight above the jungle treeline. The flora is a kaleidoscope of tropical color with bromeliads, heliconias and orchids set against the verdant green of the tropical forest. Later, jump into the cool, refreshing waters of the bay for an afternoon swim.