Spend a day cruising the unspoiled wonders of the Kenai Fjords National Park. The narrated tour begins when your vessel ventures out from Seward to Resurrection Bay. Then out to the open waters of the Gulf of Alaska, around Aialik Peninsula to the face of Aialik Glacier. As you marvel at the serene surroundings, listen for the thunder of ''calving'' - a process by which glaciers shed giant blocks and slabs of ancient ice and sends it crashing into the still waters of this protected harbor. Watch for a variety of marine life such as humpback whales, orcas, seabirds, sea lions, and otters. A complimentary lunch is served as you keep track of your route on flat screen monitors. The winds can be cold, even on sunny days, so plan to dress in warm layers that include a windproof and waterproof outer shell, a warm hat and gloves or mittens.