Also known as "the Delta of Bucharest", Vacaresti lake is a strange, intriguing raw nature island between communist blocks of flats in a southern district of Bucharest, covering around 200 hectares, including some 80 hectares of water; a stable ecosystem consisting of fish, wild ducks, swans, lizards and gulls where during the summer nest over 90 species of wild birds. The area was supposed to be a reservoir and a concrete dam was built to surround it. From an unfinished piece of urban water infrastructure abandoned in 1989, Văcărești has been reconquered by nature and wildlife without any human intervention, to become one of Romania’s most diverse ecosystems.