They have to find and clear their way through caves, forests and meadows.

他们必须找到并清除通过洞穴，森林和草原的路上。

youdao

The guide led us through the maze of caves.

那个向导领我们穿过迷宫般的曲折洞穴。

《新英汉大辞典》

Through time, rubble with larger rocks would fall and create piles with caves or subterranean voids.

经过漫长的时间，拥有更大岩石的碎石会掉落并形成洞穴或隐秘的孔洞。

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Guides lead groups on lighted paths down into the ground and through the caves.

VOA: special.2009.07.20

As if going to wander through Batu Caves and the colorful streets shown above weren't enough reason to visit Malaysia...

ENGADGET: Belarus limits use of 'foreign' websites, while Kuala Lumpur mandates WiFi in eateries

John Collins carried the Olympic Flame through Marble Arch Caves on a boat, navigating the underground river on its way to the London Olympics.

UNESCO: Olympic torch carried through iconic Geopark

Watch a video of the torch being carried through the Marble Arch Caves here (BBC webite).

UNESCO: Olympic torch carried through iconic Geopark