The Puerto Princesa Underground River in the Philippines is an awe-inspiring natural marvel. This subterranean river stretches a remarkable length, winding its way into the sea and journeying through a magnificent limestone cave adorned with remarkable formations. It's no wonder this site has gained recognition as a UNESCO World Heritage Site, celebrated for its unique geological characteristics and rich biodiversity. For those eager to experience its wonders, guided boat tours provide a fantastic opportunity to delve into the cave's breathtaking structures and vibrant ecosystem up close.

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