Dreaming of drifting from the North Sea canals to the heart of the Danube, past castles, vineyards, and storybook towns? An Amsterdam to Budapest river cruise ties together four waterways and five countries in one flowing journey. This guide breaks down routes, seasons, costs, and on‑the‑ground tips so you can plan with confidence. Read on for city highlights, packing ideas, and smart booking moves that make every port feel seamless.