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Barra del Colorado National Wildlife Refuge
Nestled in the northeastern corner of [Costa Rica](/costa-rica), on the Nicaraguan boarder, is this massive 225,365 acre (91,200 ha) national wildlife refuge-the largest in the nation. The reserve is a vast network of slow-moving waterways that feed into stagnant saline pools, lagoons, and swampy marshlands. Much of this refuge is inaccessible to eco-tourists due to poor roads and infrastructure which have kept Barra Del Colorado an isolated wonder.