 This evolved into the 1967 exhibition along the public road of 200 sculptures by 63 artists, which stretched from the city of Groningen to the east of the province of Groningen.In 1997 Waalkens organized his last notable exhibition, named the "Koetekendagen" (Cow-drawing-days), whereby thirty artists were presented drawing, painting or sculpturing cows.In 2000 Waalkens received the Benno Premsela Prize from the Netherlands Foundation for Visual Arts for his stimulating attitude towards artists.