Itchan-Kala is an old city in Khiva, an open-air museum. You could even say that it is a city within a city. An inner city surrounded by powerful walls that once served to protect the city from enemies. Defensive towers were erected in the walls every 30 meters. The walls are 8-10 meters high, 5-6 meters thick, and 6250 meters long. The walls are made of adobe (a mixture of clay and straw). Part of the walls is open to tourists. You can independently climb them, take a walk and look at the outer and inner city from a height.