The Galapagos Islands are an archipelago of 19 volcanic islands situated 1,000 km off the coast of Ecuador. The youngest of these islands are still being formed by volcanic eruptions. The incredible ecological variety of the island and the unique adaptations of its animal species inspired Charles Darwin to propose his theory of evolution by natural selection after his visit in 1835. In 2007 it was placed on the list of world heritage sites in danger because of threats of invading species and increasing tourism and immigration.
