Baku packs centuries of contrast into a compact city center, so prioritizing the right sights matters on a short trip. Start in the Old City (Icherisheher), where the Maiden Tower and the Palace of the Shirvanshahs preserve the walled medieval capital almost untouched. Step outside its gates and the skyline flips to the future: the Heydar Aliyev Center's flowing white curves and the glowing Flame Towers define modern Baku after dark. Round things out with a stroll along Baku Boulevard or a climb to Upland Park for the best harbor views, and, if time allows, a side trip to the eternally burning hillside at Yanar Dag. This mix of old, new, and natural covers Baku's essential character in a single day or two.