Belgrade Fortress is a historic fortress complex located on a hill overlooking the confluence of the Sava and Danube rivers in the center of Belgrade, the capital of Serbia. The fortress has a rich history dating back to the Roman Empire, and it has been destroyed and rebuilt many times over the centuries.

The fortress consists of the Upper Town, Lower Town, and the Kalemegdan Park, covering an area of over 200 hectares. The Upper Town is the oldest part of the fortress, where the main fortification was located. The Lower Town was built in the 18th and 19th centuries and was used as a residential area for soldiers and civilians.

The fortress has been the site of many battles throughout history, including the sieges by the Ottoman Turks in the 16th and 18th centuries, as well as the two World Wars. Today, it is a popular tourist attraction, with several museums, galleries, and monuments located within the fortress complex, including the Military Museum, the Museum of the City of Belgrade, the Roman Well, and the Monument of Gratitude to France.

In addition to its historical and cultural significance, Belgrade Fortress offers stunning views of the city and the rivers from its high vantage point, making it a popular spot for visitors to enjoy a panoramic view of Belgrade.