Known as the inspiration for Charles Darwin's theory of evolution, this cluster of islands is so isolated that many of its creatures cannot be found anywhere else on earth. Clinging to rocky shores, soaring above a desolate landscape or swimming in equatorial waters, the wildlife found on these islands is, in the truest sense of the word, unique. From the giant tortoises that bare the Galapagos name, to the marine iguanas and "Darwin" finches, these islands afford visitors the chance to observe a living laboratory of adaptation.