Ada Huja (Serbian Cyrillic: Ада Хуја) is an urban neighborhood of Belgrade, the capital of Serbia.

The island and the entire Danube's bank across it (Viline Vode, Karaburma, Višnjička Banja) is rich in springs of the sulfur water.

At the beginning of the 20th century, the island was covered with lush vegetation and vineyards, helped by the favorable micro-climate (winds) and thermal springs.

The filling up of the Danube's bed between the bank of Belgrade and the island began, with garbage and dirt, effectively turning Ada Huja into a peninsula in the 1960s.

[1][2][4][5] At the bottom of the Danube next to Ada Huja is the ruin of a plane of the Royal Yugoslav Army Air Force.

[7][8] However, new mayor Aleksandar Šapić stated in July 2022 that the riverine public transportation project will not be pursued further, calling it too expensive and "pointless".

It is filled with many hangars and companies for building and construction, including a series of concrete plants and gravel and aggregates storing and treating facilities.

[11] Eastern section, on the western tip of the Rukavac is generally referred to as Ada Huja by most people, as the former island begins here.

The company still receives large quantities of garbage, earth and rubble which is used to stabilize the marsh in the central part and for continuing filling up of the Rukavac.

Already in 2008 it was estimated that the Rukavac can't be saved anyway and that its eastern section, up to the mouth of the Mirijevski Potok, should be filled with earth and turned into the ground.

An estimated cost of the healing project measures in the tens of millions of euros, which would include a particular area where the contaminated sludge would be transferred and treated.

Specific species of trees have to be selected for the reforestation and still the land would have to be filled with at least a meter thick layer of humus before the planting.

[5] In 2012 environmentalists suggested construction of the pontoon bridge, bicycle path and the bird watch tower as there are six pairs of white-tailed eagles living in Ada Huja.

Experts also suggested for the pipe to be conducted below Ada Huja, connecting the main flow of the Danube with Rukavac.

It is an amalgam of all the previous ones and envisions a modern residential-commercial complex (including highrise), removal of the industrial zone, new bridge over the Danube, cleaning of the area and construction of the sewage system.

Majority of the locality, which in total should cover 100 ha (250 acres), will be adapted as the excursion ground with green areas and sport facilities, like on Ada Ciganlija.

[2] By September 2019, Ada Huja remained one of the major ecological black spot in Belgrade, with toxic sludge, mounds of garbage and constant saturation with the wastewater.

Situation in the Rukavac has been described as a "true urban ecocide" and an open cesspit, as the drainage of the sewage from the uphill neighborhoods (Karaburma, Rospi Ćuprija, Višnjica, Mirijevo) continued.

The swimming is strictly forbidden while the sailing is considered unsafe due to the floating garbage, despite the existing berth in the Marina Višnjica.

All plans for revitalization were postponed until the sewage and wastewater are conducted into the projected water treatment facility in Veliko Selo.

City officials rejected the idea that forming of the forested area, instead of the urbanized neighborhood, came under pressure from growing, regular ecological protests all over Serbia.

Official plan should be adopted in March 2022, and removal and resettling of the existing industrial facilities and slums, and transformation into the park should be finished by 2024.

It was ceremonially opened by the prime minister Ana Brnabić, who claimed that park was built from the funds of the ruling Serbian Progressive Party.

[27] In July 2023, the Irish company Smurfit Kappa which owns the paper factory, announced that testing of the facility for water treatment will start in August before becoming fully operational in September.

[30][31] Every Belgrade's general urban plan (GUP) since the mid-1950s included the bridge over the Danube, connecting the neighborhoods of Višnjica and Krnjača, over Ada Huja.

[40] Across the easternmost tip of Ada Huja, due to the alluvial silt brought by the Danube, another smaller island formed across the bank of Višnjica.