Starting at Bạch Đằng, Đà Nẵng, Vietnam, open the Explorial app and enter the 6-digit game code that you received by text and Viator chat message to begin. The route begins along the Han River promenade, one of Da Nang's most energetic public spaces, before heading into the city. The first riddles lead you to the Dragon Bridge — one of the longest bridges in Southeast Asia — where a steel dragon spans the Han River with its jaws open to the sea. Next, the trail takes you to Da Nang Cathedral, a pink French colonial church that stands out vividly in the city's streetscape and remains a working parish church today. The app then guides you to Han Market, the city's most famous traditional market and the beating commercial heart of Da Nang for generations. Around 2 hours of walking, any group size. A fully charged smartphone with mobile data is required.