Durbuy claims to be the smallest city in the world — it holds a formal charter of city status while having a population of only a few hundred in the historic core. Whether or not the claim holds up to scrutiny, the medieval centre is genuinely lovely: cobblestone streets, an old stone bridge over the Ourthe, and a tight cluster of historic buildings presided over by a 17th-century castle.
Cross the old bridge and you face the Castle of Ursel, rebuilt in the 17th century on the ruins of an 11th-century fortification, with the Saint-Nicolas Church and the Corn Hall — a half-timbered civic building documented since 1380 — completing the ensemble. The whole historic core can be walked in under an hour, which is part of its appeal.
The surrounding Ardennes countryside is the other draw. Kayaking the Ourthe is the quintessential summer activity, with outfitters in Barvaux-sur-Ourthe, 5 kilometres away, providing equipment and logistics for river trips. Rock climbing, mountain biking, and hiking trails fan out into the forested hills above the valley. A quirky topiary park near the edge of town offers something different for families.
Durbuy fills up with day-trippers from Brussels and Liège on summer weekends. If you want the town to yourself, arrive on a weekday morning in spring or autumn.