The longest, deepest fjord in the United States connects Juneau with Skagway. A major gold rush route, this waterway—97 kilometers long and over 610 meters deep—makes for glorious scenic cruising. At its northeastern tip near Skagway, cliffs display ancient quartz-flecked rocks. Just south, Haines loads on the snow-cragged vistas with the Takinshas, the Chilkats, the Takshanuks and the Coast Mountains. Bundle up and try to be on deck to see them, especially when the magic hour—just before sunset—casts a tawny glow over the landscape.