Zaragoza has spent two thousand years building on top of itself: a Roman theatre buried under the streets, a Muslim Palace of Joy that now houses a parliament, two rival cathedrals, and a grand plaza that was once the city's cemetery. This self-guided walking tour peels back those layers and tells the stories behind them. Everything runs from your phone. You get a clear map of all 10 stops, simple directions through Google Maps, and a short audio story with an interactive quiz at each location. The route runs from the Islamic Aljafería Palace through the old town to the buried Roman theatre, passing the great Basilica of El Pilar, the bullet-scarred Puerta del Carmen, the medieval Puente de Piedra over the Ebro, and the Mudéjar cathedral of La Seo. Start anytime, pause whenever you like, and explore freely. No groups, no schedules. Audio and text available in 7 languages. And it comes with a free eSIM, redeemable once per account, so your map, directions and audio work from the moment you arrive, with no roaming charges.