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    <title>Qualla: Tú Làn Caves System</title>
    <link>https://qualla.com/tu-lan-caves-system</link>
    <description><![CDATA[More than ten caves connected by underground rivers thread through 400-million-year-old limestone in one of Vietnam's most remote jungle valleys, where the youngest passages are only three million years old.]]></description>
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    <lastBuildDate>Mon, 20 Jul 2026 10:21:37 GMT</lastBuildDate>
    <itunes:author>Qualla</itunes:author>
    <itunes:summary><![CDATA[More than ten caves connected by underground rivers thread through 400-million-year-old limestone in one of Vietnam's most remote jungle valleys, where the youngest passages are only three million years old.]]></itunes:summary>
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      <title>Qualla: Tú Làn Caves System</title>
      <link>https://qualla.com/tu-lan-caves-system</link>
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      <title>Tú Làn Caves System: Introduction</title>
      <link>https://qualla.com/tu-lan-caves-system/</link>
      <description><![CDATA[Photo credit Bbbaongoc, CC BY-SA 4.0. To reach the Tú Làn caves, you trek through jungle, cross buffalo fields, and wade into underground rivers that punch straight through mountains. There is no road to the entrance, no parking lot, no boardwalk. The cave system sits on the Rao Nan river in Tân Hóa Village, Minh Hóa District, about 70 kilometers northwest of Phong Nha-Kẻ Bàng National Park in Quảng Bình Province, Vietnam. It comprises more than ten named caves, and the journey to them is as much the point as the caves themselves.]]></description>
      <content:encoded><![CDATA[<p>Photo credit Bbbaongoc, CC BY-SA 4.0. To reach the Tú Làn caves, you trek through jungle, cross buffalo fields, and wade into underground rivers that punch straight through mountains. There is no road to the entrance, no parking lot, no boardwalk. The cave system sits on the Rao Nan river in Tân Hóa Village, Minh Hóa District, about 70 kilometers northwest of Phong Nha-Kẻ Bàng National Park in Quảng Bình Province, Vietnam. It comprises more than ten named caves, and the journey to them is as much the point as the caves themselves.</p>
<p><strong>Read more:</strong> <a href="https://qualla.com/tu-lan-caves-system/">Tú Làn Caves System on Qualla</a></p><p><em>Image: Bbbaongoc | CC BY-SA 4.0</em></p>]]></content:encoded>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
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      <itunes:duration>0:06</itunes:duration>
      <itunes:episode>1</itunes:episode>
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      <title>Tú Làn Caves System: Ten Caves, Two Ages</title>
      <link>https://qualla.com/tu-lan-caves-system/</link>
      <description><![CDATA[Photo credit Bbbaongoc, CC BY-SA 4.0. The Tú Làn system splits into two geological generations. The high, dry caves - including Ton Cave and dry Tú Làn - date to roughly five million years ago, formed when ancient rivers flowed at what is now mountaintop elevation. The lower river caves, still actively carved by flow...]]></description>
      <content:encoded><![CDATA[<p>Photo credit Bbbaongoc, CC BY-SA 4.0. The Tú Làn system splits into two geological generations. The high, dry caves - including Ton Cave and dry Tú Làn - date to roughly five million years ago, formed when ancient rivers flowed at what is now mountaintop elevation. The lower river caves, still actively carved by flow...</p>
<p><strong>Read more:</strong> <a href="https://qualla.com/tu-lan-caves-system/">Tú Làn Caves System on Qualla</a></p><p><em>Image: Bbbaongoc | CC BY-SA 4.0</em></p>]]></content:encoded>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
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      <itunes:duration>0:06</itunes:duration>
      <itunes:episode>2</itunes:episode>
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      <title>Tú Làn Caves System: Four Hundred Million Years of Stone</title>
      <link>https://qualla.com/tu-lan-caves-system/</link>
      <description><![CDATA[Photo credit Bbbaongoc, CC BY-SA 4.0. The limestone in which the Tú Làn caves are carved is approximately 400 million years old, dating to the Devonian period when this part of Southeast Asia lay beneath a warm shallow sea. Over hundreds of millions of years, the accumulated shells and coral skeletons of that sea com...]]></description>
      <content:encoded><![CDATA[<p>Photo credit Bbbaongoc, CC BY-SA 4.0. The limestone in which the Tú Làn caves are carved is approximately 400 million years old, dating to the Devonian period when this part of Southeast Asia lay beneath a warm shallow sea. Over hundreds of millions of years, the accumulated shells and coral skeletons of that sea com...</p>
<p><strong>Read more:</strong> <a href="https://qualla.com/tu-lan-caves-system/">Tú Làn Caves System on Qualla</a></p><p><em>Image: Bbbaongoc | CC BY-SA 4.0</em></p>]]></content:encoded>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
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      <title>Tú Làn Caves System: The Trek Is the Entrance Fee</title>
      <link>https://qualla.com/tu-lan-caves-system/</link>
      <description><![CDATA[Photo credit Bbbaongoc, CC BY-SA 4.0. Tú Làn is not a show cave. There are no electric lights, no handrails, no interpretive signs. Getting there requires a multi-day jungle trek that begins in Tân Hóa, a farming village surrounded by limestone karst towers. The trail crosses the Rao Nan river multiple times, passes ...]]></description>
      <content:encoded><![CDATA[<p>Photo credit Bbbaongoc, CC BY-SA 4.0. Tú Làn is not a show cave. There are no electric lights, no handrails, no interpretive signs. Getting there requires a multi-day jungle trek that begins in Tân Hóa, a farming village surrounded by limestone karst towers. The trail crosses the Rao Nan river multiple times, passes ...</p>
<p><strong>Read more:</strong> <a href="https://qualla.com/tu-lan-caves-system/">Tú Làn Caves System on Qualla</a></p><p><em>Image: Bbbaongoc | CC BY-SA 4.0</em></p>]]></content:encoded>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
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      <itunes:duration>0:06</itunes:duration>
      <itunes:episode>4</itunes:episode>
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      <title>Tú Làn Caves System: Discovered in Pieces</title>
      <link>https://qualla.com/tu-lan-caves-system/</link>
      <description><![CDATA[Photo credit Bbbaongoc, CC BY-SA 4.0. The Tú Làn system was not found all at once. Some of its caves were originally discovered and explored in 1992, while others have only come to light in recent years. This piecemeal revelation reflects the sheer difficulty of the terrain. Dense jungle, steep karst ridges, and the ...]]></description>
      <content:encoded><![CDATA[<p>Photo credit Bbbaongoc, CC BY-SA 4.0. The Tú Làn system was not found all at once. Some of its caves were originally discovered and explored in 1992, while others have only come to light in recent years. This piecemeal revelation reflects the sheer difficulty of the terrain. Dense jungle, steep karst ridges, and the ...</p>
<p><strong>Read more:</strong> <a href="https://qualla.com/tu-lan-caves-system/">Tú Làn Caves System on Qualla</a></p><p><em>Image: Bbbaongoc | CC BY-SA 4.0</em></p>]]></content:encoded>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
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      <itunes:episode>5</itunes:episode>
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