Puerto Princesa underground river national park is the new 7 wonders of Nature. Inside the cave would cover the first kilometers of this 8.2 km. underground river known to be the longest navigable in the world.
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From @jazflor123
Puerto Princesa underground river national park is the new 7 wonders of Nature. Inside the cave would cover the first kilometers of this 8.2 km. underground river known to be the longest navigable in the world.