My pick
My tip“Closed Mondays; the ticket is about 8 euros, and the wall walk is split into several sections with multiple entrances.”
The most complete medieval city wall in the world: 2.5 km long, with 87 towers and 9 gates, built from the late 11th century when Ávila was a frontier post on the edge of al-Andalus; UNESCO-listed.
Address
C. Conde Don Ramón, 15