One of the centerpieces for free public gathering in downtown St. Louis is back open after eight months of renovations. Citygarden, the three-acre sculpture park stretching along the Gateway Mall, is again offering a greener and more peaceful environment than the busy streets and city sidewalks it sits among. As St. Louis Public Radio’s Jeremy Goodwin reports, an opening day party at Citygarden offered a view of the amenity as a colorful hub for city residents and visitors.