Longview Park Conservatory and Gardens is a 39-acre public park in Rock Island, Illinois, centered on a greenhouse built in 1937 by the Works Progress Administration. It blends a botanical mission with neighborhood recreation, offering flower gardens, walking paths, picnic shelters, playgrounds, tennis courts, a volleyball pit, a swimming pool, and a well-regarded disc golf course. The conservatory gained added recognition in 2009 when it was included among Rock Island's 100 Most Significant Unprotected Structures, highlighting both its New Deal-era architectural importance and its continuing role as a public garden and community park.