Following a small footpath, the visitor first sees a long concrete wall, 3m high, with a single opening.

通过一条小人行道，参观者可以看到一道长长的三米高混凝土墙，墙上只有一道开口。

youdao

Following a small footpath, the visitor first sees a long concrete wall, 3m high, with a single opening.

通过一条小人行道，参观者可以看到一道长长的三米高混凝土墙，墙上只有一道开口。

youdao