On your left, you'll find the entrance to the Büyük valide han, one of the many scattered around Istanbul. Back in the day, these were roadside inns for camel-riding merchants from the East, who would come to sell their goods at this legendary trading hub. Today, this 3-century-old caravanserai is home to numerous craftsmen who welcome curious visitors into their workshops. Don't let the dark, gloomy entrance scare you off – unleash your inner explorer and peek inside! Bonus tip: if they let you up to the roof, definitely go for it. You'll enjoy one of the best views of Istanbul.