过了山口，磴道就向下斜挂在山阴夹立的崖壁上，汩汩声清晰地传上山谷，呼唤着游人往下走。
O O B-Location I-Location O B-Thing I-Thing O O O O O O B-Location I-Location O O O B-Thing I-Thing B-Location O O O O O O O O O B-Location I-Location O O O O B-Person I-Person O O O O