Outdoor escape game by Qula โ not a physical escape room, but a self-guided puzzle trail through Delft. In Delft there are 2 different routes. Delft is known for the world-famous Delft Blue. The City Trail takes players at their own pace through the city: on their smartphone they solve riddles and tasks that lead from place to place, passing highlights of Delft such as Prinsenhof, the Oude Kerk and Vermeer Centrum among others. It's an independent treasure hunt without a guide, where the team with the most points wins.