Bilbao's old town was born as seven parallel streets, laid out by royal charter in 1300 and squeezed between a bend in the Nervión River and the slopes above. This self-guided walking tour traces that medieval grid, the Casco Viejo, from the theatre that lit up the city's Belle Époque to the ironworks quay Shakespeare once mentioned, through the essential sights of Bilbao. 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 Arriagako Enparantza to Martzana Kaia, passing Plaza Nueva's arcaded square, the Seven Streets of the Casco Viejo, and the ironwork of the Ribera Market. 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.