Gülhane Park runs downhill under tall plane trees from the walls of Topkapı Palace to the point where the Golden Horn meets the Bosphorus. You walk shaded gravel paths, hear parakeets screech in the canopy, and come out on a terrace looking across the water to the Asian shore. In spring the flower beds turn into long ribbons of tulips. Families picnic on the grass, students read on the benches, and ferries slide past below the railing.
This was the sultans' private outer garden for centuries, closed to everyone outside the palace, and it opened to the city in 1912 as one of Istanbul's first public parks. The Byzantine sea wall still runs along its lower edge, the same line that once closed the city off from the Marmara. A weathered Roman column stands among the trees near that end, its Latin still legible on the base. The park is busiest on spring weekends, when the tulip beds draw half of Istanbul with a camera.