Antalya's old town, Kaleiçi ("inside the castle"), perches on sheer cliffs above a crescent-shaped Roman harbor that still bustles with fishing boats and excursion gulets. You enter, as Emperor Hadrian did in 130 AD, through the triple-arched white-marble Hadrian's Gate, then lose yourself — everyone does — in narrow cobbled lanes of red-roofed Ottoman houses, hidden courtyards and Seljuk minarets. Down by the water, the 2nd-century Hıdırlık Tower watches over the marina, and neighboring Karaalioğlu Park serves up clifftop sunset views across the bay to the mountains. Each stop has its own audio story, so the district's Roman, Byzantine, Seljuk and Ottoman layers come apart as you wander.