Kráľová (also known as Kaskády) is a multipurpose water reservoir in Slovakia, between Sereď and Šaľa. It is built on the Váh River between 44.2 and 78.6 river kilometres. Kráľová was completed in 1985 with the aim of using the Váh River for energy, flood protection of the adjacent area, for gravel mining, as a reservoir for irrigation water, for navigability of the given section of the Váh, for fish farming and as an environment for recreation and water sports. It is part of the Váh Cascade dam system. The reservoir contains a Hydroelectric power plant that was built between the years 1980–1985 according to the Hydroconsult Bratislava project. Nowadays, the building is fully automated and its operation is ensured by only 9 workers.