Térraba-Sierpe Wetlands

The outboard cuts and the boat drifts into silence. Mangrove roots arch overhead in corridors so narrow the hull brushes bark on both sides; a caiman floats motionless ahead, eye level with the gunwale. In Térraba-Sierpe, water and land have negotiated their boundary through roots for millennia — and the roots are winning.

Where the Térraba and Sierpe rivers braid into the Pacific, Central America's largest meandering mangrove swamp spreads across tens of thousands of Ramsar-protected hectares. The brackish channels hold crocodiles, caimans and more bird species than you could count in a week, and the guides' party trick is respect: motor lifted, hull drifting through root tunnels in glassy silence. Local women still harvest pianguas — mangrove cockles — from the mud at low tide, and the river town of Sierpe sells them as ceviche at the dock. Downstream the channels open toward Drake Bay; upstream, herons stitch the banks all the way back to the crossing.