Resnik is located in the southern section of the municipality and makes the southernmost point of the urban Belgrade City Proper.

Originally a village distant from Belgrade, it developed between the valleys of the creek of Rakovički potok and the Topčiderka river.

As it grows, Resnik almost makes a continuously built-up area with Rušanj on the south, and Pinosava on the south-east.

[3] As a large settlement, Resnik stretches over numerous geographic localities, like Ladne Vode, Arap-Čair, Gaj, Ciganske Njive, etc.

[4] According to the folk legend, the name comes from the catkins of formerly abundant walnut, and especially hazel trees, which are called rese in Serbian.

[5] This census of Belgrade nahiyah described the location of Resnik as suitable for living thanks to the fertile land, meadows, forests, water springs and geographic position.

[4] In the 1865 Topography dictionairy by Alimpije Bogić, the official scribe of the Vračar srez described Resnik as a "village in Posavlje above the Rakovica monastery, three hours from Belgrade".

Resnik's railway stations proved to be strategic in both world wars, as they were outside of the reach of the initial artillery attacks, so it was used by the military and especially for the transport of refugees.

Though initially gaining some prominence,[11] (visitors like actors, diplomats, Belgrade's mayor Branko Pešić)[4] the idea ultimately failed as the venues, being distant from downtown, weren't much attended.

Rakovica monastery is officially on the Resnik's territory, both in terms of cadastre, and local community (now Sunčani breg).

It is a popular summer destination for many inhabitants of Resnik and for Belgraders who have weekend-houses in the area, even though the water was never tested and the banks are not arranged.

Lake Pariguz was the proposed site of the 3rd European Peoples Global Action held in 2004, before it was moved to Jajinci.

[21][22] There is a memorial drinking fountain, built to commemorate denizens of Resnik who were killed in the Balkan and First World wars.

Poet Danica Marković worked in Resnik and was often visited by her friend, painter Nadežda Petrović.

Resnik railway station was located on the, now defunct, regional express network of BG Voz.

The projected commuting time, via Kijevo, Kneževac, Rakovica, Košutnjak and Topčider (the train will not stop at the last two stations), is calculated at only 18 minutes.