Islas Marietas are a group of much larger islands situated some 30km from Puerto Vallarta. Just like Los Arcos, these islands are very important areas of marine life accumulation, but being much farther from land and in the path of oceanic currents, they are being frequented by different visitors.
Brown and Blue -footed boobies, Magnificent frigate birds and many other species of sea birds nest on the islands, which made the government pronounced the zone a bird sanctuary.