Above: Caño Negro Lagoon, Costa Rica

In general,Costa Ricais a land of high volcanic peaks and thick tropical forests, but in the far north, adjacent to the country’s border with Nicaragua, the Caño Negro wetlands spread out in a tangled expanse of marshes, reed islands and sinuous channels. The ecosystem is fed by the Frío River, which meanders its way across the international frontier into Lake Nicaragua, at 3,190 square miles the largest lake in Central America.

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Above: Caño Negro Lagoon, Costa Rica

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