A visit to Istanbul would not be complete without eating baklava. The Güllüoğlu family’s version of puff pastry filled with pistachios or walnuts is among the best to be found in the entire city. The logical consequence: a colorful hoard of tourists and Istanbul natives who relish eating the delicious yet sticky confection on site and then take it home by the pound to delight their loved ones with the national dessert of Turkey.