Discover the cave that gives the national park its name, Phong Nha Cave. Your journey begins with a scenic boat trip on the Son River, gliding past picturesque riverside villages and dramatic karst cliffs. The boat then motors into the cave entrance, revealing a vast subterranean world.

Inside, the engine cuts off, and boatmen paddle silently along the underground river, allowing you to marvel at the impressive stalactites and stalagmites illuminated by subtle lighting. Often, tours allow visitors to disembark and explore a section of the cave's dry chambers on foot. It's the most classic Phong Nha cave tour.