The energy islands of Denmark are two large-scale offshore wind farm projects that the government of Denmark is planning to establish, in the North Sea and the Baltic Sea respectively, by 2030. In the North Sea, an artificial island will be constructed with the capacity to serve as a hub for up to 3 GW of offshore wind farms initially, and potentially up to 10 GW in the future. The artificial island may take the form of a sand island, steel platforms, or a large container lowered into place and filled with stone material, and would be located approximately 80 kilometres (50 mi) west of Jutland, at a water depth of 26–27 metres (85–89 ft). In the Baltic Sea, a hub will be built on the natural island of Bornholm that will be able to serve up to 3 GW of offshore wind farms.