Meet at the main plaza of Sagrada Família, facing the Nativity Façade (Carrer de la Marina side), near the ticket-holder queue area. This is a self-guided digital experience — no live guide present. You'll get your first clue via the app once you arrive.
The quest ends at Plaça Catalunya, Barcelona's central square. Your app will show a completion screen with your final story reveal once you arrive at the square — no physical check-in or guide required.