Big splash The public had its first chance to ride the world’s tallest water slide, the Verruckt, today at the Schlitterbahn Waterpark in Kansas City, Kan. This photo was taken at midday Thursday, July 10. The public had its first chance to ride the world’s tallest water slide, the Verruckt, today at the Schlitterbahn Waterpark in Kansas City, Kan. This photo was taken at midday Thursday, July 10.