At 133,000 square kilometers, the Galapagos Marine Reserve is one of the largest marine protected areas in the world and a UNESCO World Heritage site. The Galapagos Islands provides critical nesting beaches for green sea turtles. Every year turtles travel from Costa Rica, Salvador, Columbia, mainland Ecuador, Peru and Chile to nest. If you look closely in the background of this picture, you can see the outline of two hammerhead sharks. Darwin Island, Galapagos.