Starting on Marine Parade along the St Kilda foreshore, near Luna Park, you'll open the Explorial app, enter the 6-digit game code that you received by text and Viator chat message, and start exploring. The tour is fully self-guided — no guide, no fixed start time, just your group and the city. At Luna Park, the riddles begin under Mr Moon's famous gaping grin — an entrance that has been startling first-timers since 1912, guarding a wooden rollercoaster almost as old. St Kilda Pier stretches the route out over Port Phillip Bay, with the city skyline behind you, the breakwater ahead, and — around dusk — a resident colony of little penguins. The Wonderful Two adds a playful note of public art to the trail, proof that St Kilda never takes itself too seriously; the app will make sure you look at it properly. Around 2 hours, gelato and coffee stops at your discretion. By the end, you'll get why Melburnians never really outgrow St Kilda.