Getting there and around
Free train from Luxembourg to Ettelbruck (35 minutes), then bus 570 to Vianden (25 minutes) — total about 90 minutes. Vianden itself is walkable: from the bus stop uphill to the castle takes 15 minutes, or a shuttle runs during high season. The castle opens 10am-6pm April-September, 10am-4pm rest of year, entry $12.
What else to do
The chairlift up the opposite side of the valley ($8 return) gives you the classic postcard view of the castle across the Our. In town, walk the ramparts and the small Victor Hugo museum ($5) — the writer lived here in 1871. Lunch at Auberge Aal Veinen for game and Luxembourg wines around $25. For a longer day, hike back down to Diekirch (12km, well-marked) and train home.
Good to know
Is Vianden worth an overnight?+
If you want a peaceful evening in a medieval village with no day-trippers, yes. Hotel Belle-Vue or Hotel Théâtre both run $110-$140. Otherwise a long day trip covers it.
When is the castle least crowded?+
Weekday mornings before 11am, and October-March. Summer weekends and the medieval festival (early August) draw serious crowds.