From our hotel room, we had a perfect view of the Reuss River and the Spreuerbrücke. It’s commonly called the Mill Bridge because three grain mills once operated here. The name “Chaff Bridge” comes from the fact that folks were allowed to toss the wheat chaff into the water from this point, since it was the furthest bridge downstream, away from the lake and city. Today, a hydroelectric plant beneath the bridge generates power for 1,000 Luzern households.