Puerto Princesa Underground River
A UNESCO World Heritage underground river
The Puerto Princesa Underground River in the Philippines is a stunning natural wonder. It features a unique underground river that flows directly into the sea, with a cave system full of impressive stalactites and stalagmites. The river is over 8 kilometers long, making it one of the longest navigable underground rivers in the world. This site is recognized as a UNESCO World Heritage Site and is an important habitat for biodiversity, including several threatened species. Visitors can explore the river on guided boat tours, experiencing its geological beauty and diverse wildlife.
- Philippines Exclusive
- First Release Nov 28, 2025
- https://en.wikipedia.org/wiki/Puerto_Princesa_Subterranean_River_National_Park
Where is it?
Puerto Princesa City, Palawan, Philippines
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The stamp description may contain AI-generated text and inaccuracies. It is provided for reference only, primarily sourced from Wikipedia, UNESCO, and other reliable references. Maps and address data powered by Google Places API.
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The stamp description may contain AI-generated text and inaccuracies. It is provided for reference only, primarily sourced from Wikipedia, UNESCO, and other reliable references. Maps and address data powered by Google Places API.
