American Cruise Lines announced its line-up for 2025, including more new ships, 8 new itineraries, and the longest river cruise in the country, the 51-Day Great United States. 2025 offerings also feature an array of exclusive U.S. cruises, including bucket-list adventures exploring U.S. National Parks from Alaska to Wyoming to the Smoky Mountains. Next year, the world’s only 100% U.S.