The cave is called the dark cave because it is made of mostly basalt in addition to limestone. The basalt is a black hard rock, giving it its dark name. Basalt and limestone surrounding you, you squished through the passage using only your headlamps.
By the time we got through the passage, you are covered in mud and ready for another swim. This time you can go further into the cave, where the width was probably 100m and the depth is deeper than anyone could touch. As you swim, you have to duck under huge stalagmites and balance between limestone columns to get to the next big opening.
One the way back, everyone turn out their lights during the long swim stretch and you can swim in darkness. It is surreal. Probably the coolest thing you have’ve done.
Dark cave is amazing and the true experience, kayaking over the river to get there, walking through the dark with only the head touch on your mining helmet, having a mud fight in the mud baths deep in the cave and then washing clean with a swim in the lake inside the cave.
Activities: Muddy bath, ziplining, swimming, kayaking, soft caving and jungle walking
Maybe its the unfathomable amount of time, maybe it’s the natural process of erosion and the complete absence of human intervention. Maybe it’s that caves are only starting to be discovered on a planet where humans have existed for thousands of years. Walking through, or swimming through, all of the caves in Phong Nha Ke Bang national park is definitely highlight of Vietnam.
Paradise cave is the longest dry cave in Asia (located in Phong Nha – Ke bang National Park’s core zone, 25km about Phong Nha cave, 75 km about Dong Hoi and 1h20 minutes driving)at the rest of the day.
With naturally primitive features, Paradise Cave looks like a landscape painting, making it very attractive to visitors. According to spelunkers, the deeper one journeys into the cave, the more one feels the wells of heavenly clarity all around. There are a series of white crystal stalactites resembling glass pillars and many other spectacular formations.
Phong Nha cave is not only a natural legacy of the world or a wonder of the country Vietnam, but also a relic system of the historic street Ho Chi Minh which collaborates with Xuan Son Ferry in order to create a route supporting for the battleground of the South Vietnam during US War. Today, this place has become the first section of Ho Chi Minh trails. Therefore, coming to Phong Nha means you are visiting this legendary trails.