Excellent. A site with lots to see and experience, it takes a few hours to go around the circular route, sometimes walking, with horse or camel drawn buggies or minivans taking you between locations. The museums and displays are good, The Paleolithic finds here helped rewrite understanding on early human life in the region, and seeing part of the old earthen bank section of the Ming Wall, and hidden tunnel fort, then the impressive new Great Wall Museum, provided some superb memories.I joined the tour bus at what was called the Western Bus Station (but is known by other names and is south of the rail station, past the first bus depo, then over the road, and in the western end of three buildings). After security there was a waiting area and information desk where we met. Several others joined at pre-arranged pickup points on route to the destination. We were taken to the entrance, tickets got for us, told when to be back at the bus, then left free to explore..