The fortified Romanesque bridge across the Fluvià river is the defining image of Besalú — and one of the finest medieval bridges in Spain. Built in the 12th century, it is crenellated along its length and anchored by a gatehouse at the town end. Its most distinctive feature is a deliberate dogleg midway across: any attacker who made it past the gatehouse was forced to slow down and change direction, exposed the whole time.
Walk across it and back. The view from the bridge toward the old town — stone buildings rising above the river, the gatehouse framing the entrance — is the reason most people come to Besalú. Early morning, before the tour groups arrive, it is especially striking.