Fireworks display over body of water during night time

There's a beautiful tradition to celebrate the peak of summer in Mayence, Germany. People organise a huge fair with wine and food from all across the world. At the height of festivities, there's an amazing fireworks show: The "Mainzer Sommerlichter" (Mayence summer lights). Three boats are slowly floating over Rhine river and light up the sky in the most beautiful of colours.