Ušće Towers (Serbian: Пословни центар Ушће, romanized: Poslovni centar Ušće; Ušće, meaning "confluence") are a 25-story mixed use skyscrapers located at Mihajlo Pupin Boulevard in the New Belgrade municipality of Belgrade, the capital of Serbia. While the second tower is under construction (as of August 2019), the first tower was the tallest building in Serbia until 1979 and construction of Genex Tower, and the second-tallest freestanding structure, after the Avala Tower.