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In the southwestern part of Costa Rica, in the Diquís Delta (potential UNESCO World Herritage site), there are extensive and complex pre-Columbian archaeological sites that have only recently been uncovered.

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The Cooperative Union of the Zone of Saints (UNCOSANTOS) initiative presents a plan to improve the level of teaching of the English language in central Costa Rica and aims to strengthen the base of English teachers of various skill levels in the region. The project is designed to inspire local communities and institutions to offer a more adequate environment for the learning of English in an area with great sustainable development potential.
 
The training process and its analysis ran through 2007.

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The Osa Peninsula embraces a vast diversity of marine and terrestrial ecosystems, habitats and species.  Osa is surrounded by major marine environments, including six Marine Protected Areas (MPAs), and is critical for the reproduction and survival of several endangered and endemic species. These species include sea turtles (Pacific green, hawksbill and leatherback), marine mammals such as dolphins and humpback whales, and fishes like bull, white tip and whale sharks, sailfish, marlin, and swordfish.  In addition, Osa harbors abundant coral reef communities.
 

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The Osa Peninsula, an area less than half the size of Rhode Island on Costa Rica’s Southern Pacific coast, hosts approximately 3% of the species found worldwide.  Nowhere on this planet does such a small area contain so many distinct tropical ecosystems.  Rapid deforestation, erosion, and poaching threaten the ecosystem and cherished species such as the jaguar and the scarlet macaw.