Qualla: Hang En: The Swift Cave https://qualla.com/hang-en en-us © 2026 Bendyline Thu, 20 Aug 2026 16:39:18 GMT Qualla serial false Qualla support@bendyline.com yes https://qualla.com/_m/w/7/5/e/hang-en-wp/hero-small.webp Qualla: Hang En: The Swift Cave https://qualla.com/hang-en Hang En: The Swift Cave: Introduction https://qualla.com/hang-en/ Photo credit Jérémie B., CC BY-SA 4.0. The birds got there first, and the name records it. Én is the Vietnamese word for swift, and the swifts nest here in a chamber roughly a hundred meters high, coming and going through gaps in the limestone that a person could not climb. Hang Én - swift cave - was known to local people for centuries before British and Vietnamese cavers put instruments to it in the 1990s and worked out what they were standing in. The mountain has a hole through it 1,645 meters long. Inside that hole there is a river, a beach, a patch of jungle and a climate that behaves differently from the one outside.

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Image: Jérémie B. | CC BY-SA 4.0

]]> Mon, 17 Aug 2026 00:00:00 GMT https://qualla.com/_m/w/7/5/e/hang-en-wp/w75e-hang-en-the-swift-cave-intro.mp3 0:06 1 full Hang En: The Swift Cave: A Mountain With a Tunnel Through It https://qualla.com/hang-en/ Photo credit Jérémie B., CC BY-SA 4.0. The dimensions are the reason Hang Én is talked about at all. The passage runs 1,645 meters clean through the ridge, reaching a maximum height of around a hundred meters and a maximum width of about a hundred and seventy. That is enough to rank it the third largest cave in the wo...

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Image: Jérémie B. | CC BY-SA 4.0

]]> Mon, 17 Aug 2026 00:00:00 GMT https://qualla.com/_m/w/7/5/e/hang-en-wp/w75e-hang-en-the-swift-cave-a-mountain-with-a-tunnel-through-it.mp3 0:06 2 full Hang En: The Swift Cave: Weather of Its Own https://qualla.com/hang-en/ Photo credit Jérémie B., CC BY-SA 4.0. What separates Hang Én from a merely large hole is that it has an interior world rather than an interior space. Sunlight reaches in through the entrances far enough to support vegetation, so there is jungle growing under rock. The river has deposited a genuine sand beach along on...

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]]> Mon, 17 Aug 2026 00:00:00 GMT https://qualla.com/_m/w/7/5/e/hang-en-wp/w75e-hang-en-the-swift-cave-weather-of-its-own.mp3 0:06 3 full Hang En: The Swift Cave: Upstream of the Largest Cave on Earth https://qualla.com/hang-en/ Photo credit Jérémie B., CC BY-SA 4.0. Hang Én is not an isolated curiosity. It is a feeder to Hang Son Doong, which lies about two kilometers away, and the two are part of the same drainage working its way through the Phong Nha karst - limestone that has been dissolving since roughly four hundred million years ago, t...

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]]> Mon, 17 Aug 2026 00:00:00 GMT https://qualla.com/_m/w/7/5/e/hang-en-wp/w75e-hang-en-the-swift-cave-upstream-of-the-largest-cave-on-earth.mp3 0:06 4 full Hang En: The Swift Cave: Neverland for a Season https://qualla.com/hang-en/ Photo credit Jérémie B., CC BY-SA 4.0. In May 2015, footage of Hang Én and Son Doong aired on the American television program Good Morning America, an unusual amount of attention for a limestone passage in Quang Binh - the province that was merged into Quang Tri in June 2025. Viet Nam News later listed the broadcast a...

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]]> Mon, 17 Aug 2026 00:00:00 GMT https://qualla.com/_m/w/7/5/e/hang-en-wp/w75e-hang-en-the-swift-cave-neverland-for-a-season.mp3 0:06 5 full