Đerdap National Park, National park along Danube River in eastern Serbia

Đerdap is a national park stretching about 100 km along the right bank of the Danube in eastern Serbia, from Golubac to Karataš near Kladovo. Its core is the Đerdap gorge, where the river cuts through the limestone of the southern Carpathians in three canyon sections: Golubac (14.5 km), Gospođin Vir (15 km) and the Veliki and Mali Kazan canyon (19 km). A forested belt 2 to 8 km wide rises from 50 to 800 metres above the water.

Đerdap National Park was declared in 1974 to protect the Iron Gates gorge and its surrounding natural area. A park management enterprise was founded on 5 June 1989 and has operated as the public company Javno preduzeće "Nacionalni park Đerdap" since 1993, with its headquarters in Donji Milanovac. The gorge has long been a strategic passage between the middle and lower Danube, and its banks hold monuments from the Lepenski Vir settlement to Trajan's Bridge and Trajan's Table.

The park's name comes from the Iron Gate, the narrow gorge where the Danube cuts through the southern Carpathians. Along the right bank, visitors can see the Golubac Fortress with its nine defensive towers, the remains of Trajan's Bridge and Trajan's Table, and the Roman limes. The Mesolithic-Neolithic settlement of Lepenski Vir is also within the park.

The park headquarters is in Donji Milanovac, with branch offices in Dobra and Tekija. The Danube makes up about 9% of the park, so boat access complements the riverside trails. The Golubac gorge is 14.5 km long and at least 230 m wide, while the Gospođin Vir gorge runs 15 km and is at least 220 m wide.

The park shelters plant species from the Pliocene era that no longer grow elsewhere, including the Djerdap tulip. This species grows only in this protected area and recalls a time millions of years ago when the climate here was warmer.