Take in the sights and sounds of the Gulf of Alaska, a broad inlet on Alaska’s southern coast encompassing the Cook Inlet, the Kenai Peninsula, and Kodiak Island. Take in the sights and sounds of the Gulf of Alaska, a broad inlet on Alaska’s southern coast. Several tidewater glaciers spill into the gulf, including Alaska’s largest — the massive Bering Glacier. The Gulf of Alaska is not only stunning, but also rich with marine life. Watch for whales, porpoises, sea otters, and other fascinating animals. Under the surface, there are rare cold-water corals and other marvels.