Fruška gora is a mountain in Syrmia, administratively part of Serbia with a part of its western side extending into eastern Croatia. The area under Serbian administration forms the country's oldest national park. Sometimes also referred to as the Jewel of Serbia, due to its largely pristine landscape and protection effort, or the Serbian Mount Athos, being the home of a large number of historical Serbian Orthodox monasteries.

Syrmia is a region of the southern Pannonian Plain, which lies between the Danube and Sava rivers. It is divided between Serbia and Croatia. Most of the region is flat, with the exception of the low Fruška gora mountain stretching along the Danube in its northern part.