Once a smelly wasteland housing the city dump, sewage sump, and Holly Beet Sugar Refinery (1920–1991), this is now a 305-acre park, with the Heddles Recreation Center (1992), Thunder Mountain Amphitheater (1991), a living history museum facsimile of Fort Roubidoux (1991), Horse Country Arena (1991), a large fishing, swimming, and boating lake, hiking trails, and a wildlife habitat. Three giant white cement towers, remnants of the demolished sugar plant, dominate the park and the townscape. New frame picnic shelters and a recycled steel highway bridge now used as pedestrian access to one of the islands in Confluence Lake add architectural interest.