Land easy, walk the old city by dusk
Land in Istanbul, base in Beyoglu, around Karakoy or Taksim. The historic peninsula is where most of the famous sights sit, but staying on this side of the Golden Horn puts you closer to better restaurants and the energy of the city locals live in. Sultanahmet works too if you want to walk to the major sights, but it is more tourist-oriented. Drop your bags, get water, take it easy in the afternoon.
Late afternoon at Hagia Sophia. Built in 537 under Justinian, the largest cathedral in the world for nearly a thousand years. The dome still surprises you from below. Note: the ground floor is an active mosque (free entry, shoes off, modest dress), but the upper gallery with the Byzantine mosaics requires a separate EUR25 tourist ticket purchased on site or online. Then across the square to the Blue Mosque, free outside prayer times, and beneath the square the Basilica Cistern, a sixth century underground reservoir with 336 marble columns standing in shallow water.
Walk across to Karakoy for dinner, far better food than the tourist restaurants in Sultanahmet. Sleep early. Tomorrow is a long walking day.
