The source provides an extensive guide for undertaking a multi-modal, cross-country journey from Miami, Florida, to Anchorage, Alaska, primarily using sleeper trains and ferries. This ambitious five-leg itinerary spans roughly 5,500 miles, utilizing Amtrak's Silver Star, Cardinal, and Empire Builder routes to travel across the Lower 48 states to Seattle. From Seattle, travelers transition to the Alaska Marine Highway System ferry before concluding the trip on the Alaska Railroad's Glacier Discovery service. The guide details various aspects of the trip, including sleeper car options, dining perks, total cost breakdowns, and practical tips for maximizing the journey, emphasizing the scenic beauty of the route and promoting the concept of "slow travel."