The Sarawak Chamber: The World’s Largest Cave Chamber That Can Fit 40 Boeing 747s

Imagine a space so vast that it could comfortably house 40 Boeing 747 airplanes. No, we’re not talking about an airport hangar or a futuristic aviation facility. We’re talking about the Sarawak Chamber, the world’s largest cave chamber, located not in France as commonly misstated, but in the depths of Gunung Mulu National Park in Malaysia. This natural wonder is a marvel of geological formation, a testament to the Earth’s age-old secrets. In this article, we’ll explore the Sarawak Chamber, its discovery, its dimensions, and why it continues to captivate the imagination of explorers and scientists alike.

The Discovery of the Sarawak Chamber

The Sarawak Chamber was discovered in 1981 by three British cavers—Andy Eavis, Dave Checkley, and Tony White. The trio was part of a larger expedition aimed at exploring the extensive cave systems of Gunung Mulu National Park. Armed with rudimentary mapping tools and an insatiable curiosity, they stumbled upon this colossal underground chamber. The sheer size of it was so overwhelming that initial estimates of its dimensions were hard to fathom.

The Mind-Boggling Dimensions

So, how big is the Sarawak Chamber? The chamber measures approximately 700 meters (2,300 feet) in length, 400 meters (1,300 feet) in width, and at least 70 meters (230 feet) in height. To put that into perspective, it’s large enough to fit 40 Boeing 747 airplanes! This makes it the largest cave chamber in the world by area, and it’s estimated to be large enough to hold London’s St. Paul’s Cathedral five times over.

Geological Marvel

The Sarawak Chamber is a limestone karst formation, which means it was formed through the dissolution of soluble rocks like limestone, dolomite, and gypsum. Over millions of years, water erosion carved out this massive chamber, creating a natural cathedral of rock. The chamber is also home to unique ecosystems, including rare species of bats and insects that have adapted to the cave’s dark, humid conditions.

The Allure for Explorers and Scientists

The Sarawak Chamber is not just a tourist attraction; it’s a living laboratory for scientists. Biologists, geologists, and climatologists are keenly interested in studying its unique ecosystems and geological formations. The cave’s isolated environment offers clues about biodiversity, climate change, and even the history of Earth itself.

How to Visit

Visiting the Sarawak Chamber is not for the faint-hearted. The journey involves a combination of trekking through dense jungle, wading through rivers, and, of course, cave exploration. Due to the challenging terrain and the sensitive ecosystems within, visits are strictly regulated, and it’s advisable to go with a guided tour.


The Sarawak Chamber in Gunung Mulu National Park is a marvel that defies imagination. Its staggering dimensions and unique ecosystems make it a must-see for anyone interested in natural wonders. While it may not be in France, as some mistakenly believe, it’s a global treasure that Malaysia is proud to call its own.

AI-generated image of Sarawak Chamber with scale comparison to Boeing 747 airplanes

The Sarawak Chamber in France is the world's largest cave chamber, large enough to fit 40 Boeing 747s.

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