Some had a practical reason for venturing underground—quarrying stone ... temples was built to join two pre-existing Buddhist ones. The most elaborate and best preserved, a 128-foot-deep, human ...

Ann Ronan Pictures/Print Collector/Getty Images (stone); DivVector ... “[He] has dedicated to the temples revenues in money and corn,” the inscribers wrote on the stone, “and has undertaken ...

Step into one of the most mind-blowing architectural wonders in the world — a full-scale traditional Chinese city built completely indoors. Featuring stone-paved streets, ancient-style architecture, ...