Venture into the sprawling Glacier Bay National Park and Preserve. This UNESCO World Heritage site comprises majestic mountains, glaciers, a rainforest and more. At Bartlett Cove, a park ranger will tell you about the local environment and share insight into eco tourism. As you sail, keep an eye out for orange-beaked puffins, guillemot and marbled murrelets. At South Marble Island, you may even spot the endangered Steller sea lions if you are lucky. From a vantage point, watch for bears along the shore line. Afterward, get up close to the tidewater glaciers, Grand Pacific and Margerie. If you’re lucky, you may even see massive chunks of ice plunging into the sea. Time permitting, pass Tidal Inlet, where you’ll notice the effects of deglaciation that have resulted in barren scars of sediment and steep rocky slopes. Then, while you dine on-board, your captain will navigate the vessel into Icy Strait.