Marble Islands, Alaska, USA
Marble IslandsAnimal fans should race to the railing for one of the bay’s first highlights. Humpback whales often congregate here, diving deep to feed. Birdwatchers relish the south island, home to murres, kittiwakes and cormorants, along with tufted and horned puffins. Meanwhile, plump harbor seals tend to rest on the northern tip of the north island. The park’s most common marine mammal, these pinnipeds can plunge down to 500 meters and remain submerged for over 20 minutes.