Cementland is an incomplete public art exhibit on the 54-acre site of a former cement factory just north of St. Louis, Missouri. The brainchild of sculptor Bob Cassilly, who also created St. Louis' City Museum, it contains giant concrete sculptures and obsolete machinery, and was planned to have navigable waterways, among many other features. The Cassilly family said that they had hopes to continue construction on the project, but in 2022 they sold the site at auction for $785,000. St. Louis photographer Richard Sprengeler has extensively photographed the site as part of a 2022 series.