Travel Bucketlist The Longest Underground River: Exploring Puerto Princesa River, Philippines Posted: March 22, 2025 | Last updated: March 22, 2025 Dive into the incredible underwater wonder of ...

Sistema Sac Actun (Mexico) – Located in the Yucatán Peninsula, it's one of the world’s longest underground rivers, connected to ancient Mayan cenotes. Lost River (USA – Indiana) – This river vanishes ...

Traditional, double outrigger boats called banca glide across the glass-like waters of Palawan, an idyllic island province in the Philippines ... through an underground river, swimming in hidden ...