Outdoor escape game by Qula — not a physical escape room, but a self-guided puzzle route through Heerenveen. Heerenveen is known for its top-sport character around the football stadium. The City Trail takes players through the city at their own pace: on their smartphone they solve riddles and complete tasks that lead from place to place, passing by among others Crackstate, Kruiskerk, Heerenveen football stadium and Oenemastate. It's an independent treasure hunt without a guide, where the team with the most points wins.