As cities develop, more and more areas are occupied by buildings and transportation infrastructure. It is only natural that urban development requires the creation of recreational infrastructure for city residents. Recreational infrastructure is essential for the proper functioning of city dwellers. Providing land for such infrastructure falls under the responsibility of local authorities. However, acquiring such land in large cities is very expensive. Therefore, areas with development restrictions become a natural space for recreational facilities. For this reason, the use of river valleys has been studied. These areas are currently used as floodplains in case of floods. The presented analyses were carried out for the city of Sandomierz. It is one of the oldest cities in Poland. The unique character of this city attracts many tourists each year. Most tourist attractions are located near the Old Town. The Old Town of Sandomierz is situated on the banks of the Vistula River. The Vistula River is the largest river in Poland. During floods it swells and the water overflows its bed. in order to protect residents from flooding, flood zones are designated, and flood embankments are constructed. Floodplains in this area occupy a significant part of the city. The research involved both geospatial and legal documentation analyses of this area. The paper proposes alternative ways of using these areas, taking into account the interests of city residents, municipal authorities, the natural environment, and institutions dealing with flood protection.