Day 1 — Port Vell and L’Aquàrium de Barcelona (sea, shark tunnel)
- 🐠 Start by the water: a walk along the wooden Rambla de Mar bridge to the Maremagnum shopping complex and L’Aquàrium de Barcelona (Moll d’Espanya del Port Vell, s/n, 08039). Here kids walk through an 80-meter underwater tunnel under rays and sharks; penguin feeding is a favorite moment. Plan: 1.5–2 hours at the aquarium, then ice cream on the waterfront and “free play” by the water. Logistics: to Barceloneta metro station (L4) + a 10–12 minute walk along the promenade. In the evening—an early dinner and sleep to ease into the new rhythm.