Barri Gòtic, Barcelona's medieval quarter
Premise: A 14th-century guild left behind a coded message hidden across the quarter's oldest walls, courtyards, and chapels. Teams decode Latin inscriptions, hidden symbols, and a final cipher to uncover what the guild was protecting.
Format: 2–6 teams of 4–6, 90–120 minutes, walking
Best for: corporate teams, groups wanting a classic mystery format