The hook
Fifty-odd caves cut into a sandstone cliff in the fifth century, holding tens of thousands of Buddhas, from a colossal seated figure seventeen metres tall down to inch-high rows carved across whole walls, plus, nearby, a wooden temple pinned improbably to a sheer cliff face.
01Why it's worth it
The Yungang Grottoes, outside the coal city of Datong in Shanxi, are one of the three great sites of early Chinese Buddhist cave art, begun around 460 CE under the Northern Wei. What makes them extraordinary is the scale and the moment: this is Buddhist sculpture arriving in China and blending Indian, Central Asian, and Chinese forms in real time, monumental and serene, still bearing traces of paint. It's a UNESCO site and far less mobbed than the country's headline attractions. An easy add is the Hanging Temple at nearby Hengshan, a 1,500-year-old monastery built onto a vertical cliff on slender wooden posts, unique for honouring Buddhism, Taoism, and Confucianism together. Datong itself has a heavily rebuilt old town, but the grottoes and the temple are the real draws.
02How to experience it
Give the grottoes a half day at least, starting early, and read up first so the carvings' age and cross-cultural style land. Combine with the Hanging Temple (about 1.5 hours away) for a full day out of Datong. It's a straightforward high-speed-rail trip from Beijing, and pairs well with Pingyao further south.
From the locals
It's a fixture on travellers' lists of the country's rewarding, lesser-visited places: mapping out "beautiful, lesser-traveled" spots he'd genuinely liked, one ran through "Pingyao, Shanxi… Chengde, Hebei… Luoyang, Henan… Datong, Shanxi," the northern culture route the big itineraries skip.