first visitors came to the lake. An underground pipeline was built in 1969 which conducted water from the river into the newly formed lake. The water is being purified in the Taložnik, before being conducted further into the lake and to the Belgrade's major water facility in Makiš. The shanty settlement along the mainland bank of the Sava was demolished, and number of barge-houses on the island began to grow. In the late 1960s and early 1970s the first sporting championships were organized, such as the kayaking championships in 1971, prompting the construction of special facilities. The popularity of Ada was further increased in the 1980s with the music and entertainment show Leto na Adi ("Summer on Ada"), televised live by the Radio Television of Serbia. Also in the 1980s, partial clearing of the wood on the Makiš side began, so as the filling of the beach on that side. In time, a continuous, over long beach around the entire lake was formed. On 21 August 1996, the tall bungee jumping platform became operational. Makiš side was officially declared a swimming area in the season of 2010. In June 2017 construction of two new pipelines which would increase the amount of water transferred from the Taložnik to the water treatment facility in Makiš began. As a result, during the works in the off-season 2018–2019, the lake level was significantly lowered. Ada Ciganlija is today managed by the municipal government via the Public Enterprise "Ada Ciganlija" (JP "Ada Ciganlija"), which maintains the grounds of the recreational areas and, especially, the beach and Lake Sava. It is responsible for cleanliness, maintenance such as trimming of the underwater algae, public safety (lifeguards), and so on. Even though the island is a public asset, the island itself is not exclusively managed and owned by the city. There are numerous private entities that administer businesses and recreation facilities, such as the golf course. Notably, many famous Serbian sports personalities have invested in the area. Facilities, activities and tourism Apart from the sport facilities, a 7 kilometer-long beach of Lake Sava has a closely supervised, fenced-off children's swimming area. Ada Ciganlija features a tall sports observation tower and bleachers on multiple levels which is its most prominent structure as well and one of very few permanent solid structures. One of those structures is the "Jezero" hotel at the entrance. The northern edge of the island is