The annual team-building event of the Department of Construction Materials and Construction Chemistry took place in the eastern Harz mountains this time. After a hike in the footsteps of the Brocken witch, we took the narrow-gauge railroad to Nordhausen. There was a historical tour of the town with an inspection of the half-timbered buildings and the old town wall in the town, which can boast that Goethe did not want to spend the night there. The team returned in full and would like to thank their colleague Mr. Laabs for organizing the trip.