You might want to spend some time browsing the exhibits at Gaziantep Zeugma Mosaic Museum, War Museum, or Yesemek Open Air Museum. While you're exploring, swing by Coppersmith Bazaar, Hışvahan, and Naib Turkish Bath to learn a bit about the area. Consider spending a leisurely afternoon outside at 100 Yil Atatürk Kültür Parkı, Gaziantep Botanical Garden, or Masal Park.