For a liquid to flow, the molecules must move. So can a liquid have a structure? ‘Water as a liquid—and as glass(es)’ illustrates that it can; under normal temperature and pressure conditions, the structure of liquid is represented by the random network model. Important structural data on water have been obtained from the scattering of neutrons and X-rays: the four-fold tetrahedral motif dominates, but the data also tell us how the real structure differs from the reference random network, both under normal conditions and as temperature and pressure changes. Water’s dynamical aspects when it is heated, put under pressure, becomes supercritical, and is supercooled are considered. Three distinct amorphous ice structures are also discussed.