That's true, but what connects Bandolier and Cappadocia are that they are carved out of a softer material which was created as a thick layer of volcanic ash. Vi

That's true, but what connects Bandolier and Cappadocia are that they are carved out of a softer material which was created as a thick layer of volcanic ash. Visiting both, you notice similarities. More for your list, that I visited back in the 1990s, are the Yungang Grottoes in Northern China: https://en.wikipedia.org/wiki/Yungang_Grottoes https://en.wikipedia.org/wiki/Yungang_Grottoes