Osa is a region of southern Costa Rica, filled with jungles and banana plantations, on the Pacific side of the country.
In 1941, Indiana Jones flew to Palmar Sur in the region, to visit the stone spheres known as The Three Sisters, to help guide him to the Akashic Hall of Records. The next day, Jones was confronted by his adversary, Nichols, but escaped with his pilot Bert Brodowski.
