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Mayan entrance in the caves of Xcaret, Riviera Maya, Mexico ~ Photo by raulmacias
Kaymakli, the underground city 2
Kaymakli, the underground city by ika6_, via Flickr|Cappadocia,Turkey.
Architecture on Twitter
Architecture on Twitter: "Chand Baori, a stepwell in the village Abhaneri near Jaipur, India. It has 3500 narrow steps, 13 stories. https://t.co/cQEV4RMQBZ"