Zvezdara Forest (Serbian: Звездарска шума / Zvezdarska šuma) is a park-forest in Belgrade, the capital of Serbia. Majority of the forest is located in the municipality of Zvezdara with only the small northernmost section being on the territory of Palilula. After Košutnjak and Topčider, Zvezdara is the largest forest in the urban zone of Belgrade and with them, the most important source of the oxygen for the city. While the Košuntjak-Topčider complex is being called the "Belgrade's oxygen factory", Zvezdara forest bears the moniker "left lung of the city".