Water Works Park is a 1,500 acre park near downtown Des Moines, Iowa. It is one of the largest urban parks in the United States. Located along the Raccoon River, the park offers trails, picnic areas, grills, and fields.
The park is home to Arie den Boer Arboretum, one of the world's largest collection of crab apple trees, containing approximately 300 varieties which Des Moines Water Works staff now maintains through pruning and propagation. Today, the arboretum includes approximately 1,200 trees in the collection.
The park has frequently hosted large festivals and concerts.