Islas Guanape, Peru
This four-island group is a breeding ground for huge populations of seabirds off the coast of La Libertad, Peru. It was formerly exploited for the guano used as fertilizer. The islands are now protected and guano harvesting is strictly regulated. They are rich in bird life and marine wildlife, including pelicans, boobies, Humboldt penguins and Southern sea lions, which thrive in the nutrient-rich Humboldt Current along the Peruvian coast.