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If so, enter here, wander through the chambers and passageways of the Great Pyramid, and learn about the pharaohs for whom these monumental tombs were built. You can also follow the 1997 field season of a team of archaeologists as they excavated the bakery that fed the pyramid builders. Island of the Sharks Costa Rica's Cocos Island boasts more sharks per cubic yard of water than perhaps any other place on the planet, including white tip reef sharks, 40-foot whale sharks, and hammerheads that school by the hundreds.