The corbelled stone work was an engineering feat.

拱形石砌工程是一项工程壮举。

Wow! -The stone is sandstone and it's been hand-carved and corbelled, vaulted into position, to make this beautiful chamber.

-哇！ - 石头是砂岩，经过手工雕刻和托梁，拱形到位，形成了这个美丽的房间。