Park No. 521 is 0.16 acres and it is located in the Lakeview community.
In the late 1990s, NeighborSpace, a non-profit organization devoted to creating community open spaces in Chicago, established a passive park with a perennial garden in an underserved area of the Lake View community. The organization named the .14-acre site the Warner Garden because it is located on Warner Avenue. The Chicago Park District has a long term lease with NeighborSpace for this property. The organization and neighborhood want to retain the long-used Warner Garden Park name.