The document discusses the Wax Lake Delta in Louisiana. It describes the delta as a natural laboratory that provides critical data for understanding delta evolution and restoration. The delta receives sediment from the Atchafalaya River, which has allowed it to build new land at a rate of 1-2 square km per year, proving that land building is possible with a sufficient sediment supply. The document advocates for establishing a research observatory called the DELTA LAB at the Wax Lake Delta to provide data to help design and evaluate plans for large-scale restoration of the Mississippi River Delta.