Tusi City (Tusi Cheng) is the fortified palace complex of the Tujia tusi chieftains who ruled the Enshi area for five hundred years under the Ming and Qing dynasties. The site, on a defensive hilltop east of the city, preserves stone walls, palace foundations, and ceremonial gates that record a system of indirect rule that shaped minority areas of southwest China for centuries. In 2015 it was inscribed as a UNESCO World Heritage Site, jointly with similar tusi sites in Hunan and Guizhou, as an exceptional record of China's governance of its ethnic frontiers.
The physical site is evocative without being grand — most of what survived is masonry rather than intact buildings, and understanding what you are looking at requires some context from the excellent on-site museum. That museum is worth an hour on its own: it explains the tusi system clearly, traces the specific history of the Enshi chieftainship, and shows the relationship between the fortified complex and the broader Tujia cultural tradition that produced the wooden-framed architecture still visible in village buildings throughout the region.