In 1908 Belgian architect Alban Chambon drafted a new general urban plan (GUP) in 1908 which made Košutnjak a public park.

[1] Košutnjak gained a sort of historical notoriety as prince of Serbia, Mihailo Obrenović III and his cousin Anka Konstantinović were assassinated while walking in the park on 10 June [O.S.

29 May] 1868, and when Ivan Stambolić, Slobodan Milošević's political opponent was abducted from the park on 25 August 2000 and later assassinated and buried at Fruška Gora.

In 1911, Ministry of Construction devised the plan for the cart and pedestrian roads grid, spreading from Topčider railway station to the wide meadow on one of Košutnjak's plateaus.

The 1923 Belgrade's general plan envisioned forestation of Topčidersko Brdo and Senjak, formation of the new park and establishment of the continuous green area with the Topčider and Košutnjak.

[3] However, in the late 2010s, state and government authorities began extensive construction works in the forest, cutting dozens of trees.

[18][19][20][21][22][23][24] One site is chosen as the location for the expanded "Košutnjak" sports center, in the 33,000 m2 (360,000 sq ft) large part of the forest which has been groomed since the 1960s.

[26] It was also made public that the cut trees have been transported to the house of a local representative and member of the same party, who claimed that he "paid for it".

City's detailed regulatory plan for the Filmski Grad neighborhood, which occupies the entire southwest section of Košutnjak, includes construction of the new residential complex for 8,000 people, with numerous luxurious dwellings and expensive hotels.

[31][32] City officials either said it was too early to assess the situation (chief urbanist Stojčić) or openly, with all the evidence and statements to the contrary, said that everything is a lie and that forest will not be cut (deputy mayor Goran Vesić).

[30] They cite the investors alleged interest in revitalizing the film studio, but adding ten times more residential and commercial space, with massive garages and private sports complexes, on some of the most expensive city ground.

[31][32][34] Serbian section of Europa Nostra, pan-European umbrella organization for Europe's cultural and natural heritage, examined the plan, stating that the film studios are only used as the pretext for the massive luxurious construction and that projects is opposed to the public interest.

[35] Over 30,000 citizens signed the petition, while experts teams, which included four deans and heads of Belgrade University's faculties and institutes, lodged over 7,000 complaints to the city.

City responded by informal confirmation that the project will not be changed and by banning the public inspection of this, and all other plans, citing COVID-19 pandemic, just one day after the petition was filed.

In 1928, building company "Šumadija" again proposed the construction of the cable car, which they called "air tram" but this project was planned to connect Zemun to Kalemegdan on Belgrade Fortress, via Great War Island.

After conducting extensive surveys (traffic analysis, interviews with the commuters, climatic, geological, urban and other researches), "Juginus" presented the project in 1993.

Stops in between would include the major public transportation roundabout in Banovo Brdo, Makiš and Ada Ciganlija, five in total.

The cabins were projected to receive not just the commuters, but also the bicycles, skateboards, sledges and skis, as the cableway was planned to work year-round.

The idea was then included in the Belgrade's General Regulatory Plan in December 2021, consisting of two phases: New Belgrade-Ada Ciganlija-Makiš, and Makiš-Banovo Brdo-Košutnjak.

[41] New building of the Faculty of forestry was built in 1956, right above Careva Ćuprija, where the northwest section of the vast wood of Košutnjak begins at an altitude of 110–125 meters.

Professors and students began developing a dendrology collection in 1957, which grew into the Arboretum of the Faculty of Forestry, a specific botanical garden which was protected by the state in July 2011 as the natural monument.

It was organized after the idea of the journalist and rock critic Petar Peca Popović [sr], to promote, at time sagging career, of Bijelo Dugme.

Audio footage was partially used for the band's live album Koncert kod Hajdučke česme ("Concert at Hajdučka Česma").

German commander, Generalfeldmarschall August von Mackensen, order for the dead soldiers to be buried on the hill above Banovo Brdo.

The other German monument is today within the yard of a privately owned school, while Belgrade is no more visible from the spot as the Košutnjak forest expanded and completely engulfed the area.

[47] Pionirski Grad (Serbian: Пионирски град, pronounced [piǒniːrskiː ɡrâːd]) is a sub-neighborhood of Košutnjak, in its south-central section, which belongs to the municipality of Rakovica.

[50] Pionirski Grad covers an area of 36.5 ha (90 acres) and is a non-residential settlement completely surrounded by the woods of Košutnjak.

Objects in the settlement include restaurant Ozon, two bungalows which serve as the kindergarten and outdoor terrains for basketball, futsal, handball, tennis, athletics and jogging.

In its heyday Pionirski Grad had an attendance of 100,000 per year but it lost its recreational function when the refugees from the Yugoslav Wars were settled in seven pavilions from the 1990s to 2010s.

The complex was partially renovated in the early 2010s: street lights were repaired, green areas rearranged and memorial plaques placed.