Make your way to Chandrashekhar Park — that's your starting point in the heart of Agra's old city. Open the Explorial app, enter your 6-digit game code that you received by text and Viator chat message, select English, and tap Start. The trail takes you through streets that most visitors to Agra never see. Jama Masjid — the grand congregational mosque near the old bazaar — features early with a riddle that asks you to read the architecture rather than just photograph it. At Shriram Hanuman Mandir, an observation task draws your attention to details in the temple compound. The trail continues to the Jhalkaribai Statue, where a photo challenge puts the group to the test. Between stops, the neighbourhood streets give you a glimpse of the city that exists beyond the famous skyline. The clues work well for groups of any size — some reward individual speed, others need everyone thinking together. The app reveals final scores and a ranking when the last task is done. It's a side of Agra that takes most people by surprise.