The Chacao channel separates the southwestern coast of the American continent from the north coast of the Grande island of Chiloé joining the Coronados Gulf with the Gulf of Ancud.
The road communication between both banks is made through a ferry service that connects the towns of Pargua on the mainland and Chacao on the Big Island.
The Chacao channel is considered by many biologists as the gateway to the worlds past, because once you are on the island you have access to the Chiloé National Park, one of the few wooded areas that preserve the primitive character of the flora and of fauna. The climate, humid and temperate of the archipelago allows the existence of evergreen forest, consisting of olivillos, coigües, arrayanes and alerces. The fauna of the place includes the fox chilote, sea wolf, sea otter, pudu, and Patagonian carpenter, among the most colorful.