Water basins with narrow outlets can preserve vast thicknesses of evaporites, known as salt giants, which are thought to form when marginal basins or subbasins are cut off from the main oceanic basin and the water evaporates. Sea salt precipitates and is deposited on the basin floor. They are potential frontiers for challenging research on structural, tectonic, biogenic, and fluid dynamic evolution. These structures are of global importance because they strongly affect the structural, chemical, and biological evolution of sedimentary basins.