Since their "discovery" in the 16th century, the Galápagos Islands have intrigued and inspired visitors from around the globe. Named for the giant tortoises on the islands, this UNESCO World Heritage Site is home to a unique ecosystem that largely evolved without outside influences (mainland Ecuador lies some 1,000 kilometers to the east) and offers an exceptional opportunity for wildlife viewing. Most of the 13 large islands, six smaller islands, and 42 islets that make up the Galápagos were declared part of the Galápagos National Park