Novi Sad grew between two very different worlds: a commercial city on one bank of the Danube and a vast Habsburg fortress watching from the other. This self-guided walking tour traces that route from the historic centre across the river to Petrovaradin Fortress, taking in an Art Nouveau synagogue, the neo-Gothic church everyone calls the Cathedral, an Orthodox bishop's palace, a riverside memorial, and a fortress clock whose hands are famously reversed.

Everything runs from your smartphone, with no app to download and no physical guide to follow. You get a clear map of all 8 stops, simple directions, a short audio storey at each location and an interactive quiz to unlock along the way. Start whenever you like, pause for a coffee, and set your own pace: no groups, no schedules, no waiting.

Audio and written content are available in English, German, Italian, French, Spanish, Portuguese and Chinese. The final climb through the fortress is uphill, so comfortable shoes are a good idea.