Gunung Mulu National Park: Deer Cave, 2nd Largest Cave Chamber in the World

Entering the massive Deer Cave
Entering the massive Deer Cave

Just adjacent to Lang Cave is Deer Cave. Used to be the largest cave passage in the world before Hang Dong Soon in Vietnam was discovered in 2009. Though facts are still being disputed at this time, Deer Cave is still ostentatious due to its massive size. Deer Cave extends 2 kilometers in length. The southern passage rises 125 meters high passage and has a width of 169 meters. The partially lit entrance chamber is 146 meters high. Capacious enough for 40 Boeing 747 aircraft to fit in. Just the thought of it is mind-blowing enough.

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Gunung Mulu National Park: Lang Cave and its Jellyfish Cave Formations

Lang Cave jellyfish formations
Lang Cave jellyfish formations

Suddenly there was a startling sound from above the trees. It’s like trees breaking apart or boulders cracking. Then our guide, Jangin yelled “Run!!!”. From the mouth of Lang Cave, we tracked back a few meters towards the plank walk junction where the other path leads to Deer Cave. “What the hell is that?!” I asked Jangin as I was catching my breath. “Maybe wild monkeys!” he said looking up. For a moment there I thought I was in an adventure game or movie, running on plank walks while being chased by rolling boulders. I’m not sure if our young guide was jesting us. But what a start in our exploration of Gunung Mulu National Park.

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