As a result of excavations carried out since 2003 in Tilmen, one of the most magnificent Hittite cities after Hattusa in Anatolia, this place has been turned into an Archeopark. The finds from the moundshow the bond and mutual relationship between ancient Mesopotamian and Syrian cultures and ancient Anatolian cultures. As a result of the excavations, it was understood that this place dated to 4,000 BCE, and that it was a big city in the late of the 3rd millennium BCE. In the northeast of the mound, there are 8 m high round towers that can be reached by 17-step stairs and a ramp. The walls of the castle, which is protected by two rows of walls, rise with stones of incredible size and tons of weight - The main entrance gate of the city is in the east; and both sides are protected by gate lions.

Today, in the Open-Air Museum, where nearly 500 sculptures and orthostat drafts are extracted from underground and displayed in a certain order, the gate lions, the guardians of the gates of Hittite cities constitute the vast majority of the drafts. Monumental sphinxes (female-headed winged lion), bear man, chariot, mountain men, hunting scenes are other important artifacts in the workshop. It is on the UNESCO World Heritage Tentative List.