I was amazed when I saw this cyclist riding in this park without handlebars taking absolute control of the bike & not falling into the reservoir! Upper Seletar Reservoir Park has 15 hectares of vegetation and is a favourite spot for nature lovers and joggers. The Seletar Reservoir was built in 1920 and was renamed Upper Seletar Reservoir in 1992. It is one of the 4 reservoirs that bound the nature reserves and is maintained by the National Parks of Singapore.