It’s 9.30 am on a Tuesday. The meeting point is a sandbar on the southern banks of the Inn River, a few kilometres west of the Tyrolean regional capital of Innsbruck. River guide Jasper De Wandeler is waiting for his guests, getting ready to hand them drysuits, life jackets and helmets for the day’s adventure: city rafting. Paddling along in an inflatable raft, the group will float downstream and eastwards for about two and a half hours, through the city framed by the massive Tyrolean Alps. But before the adventure can start, De Wandeler first instructs his guests on safety precautions and the…