Trang An

A small boat glides quietly through the water, slips through a dark rock cave, then drifts out between limestone peaks rising straight up on either side. At Tràng An, beauty and history are woven together so tightly that they cannot be pulled apart.

In 2014, UNESCO inscribed the Tràng An Landscape Complex as a mixed World Heritage site. Mixed means that the site is recognized for both its culture and its nature. That is not common, since most World Heritage sites are recognized for only one of the two. Tràng An meets three criteria. One is cultural. The other two are natural: scenic beauty, and geology and landforms.

The heritage area lies in Ninh Binh Province. Its core zone covers more than 6,200 hectares. Its buffer zone covers more than 6,000 hectares.

Tràng An is special in its geology too. This is a humid tropical tower karst landscape, in a late stage of its evolution. In other words, these steep, pointed limestone peaks are not young. They are the work of millions of years of erosion. Slightly acidic rainwater seeped through the limestone and slowly hollowed it out, one nook and one crevice at a time. That carved a system of underground caves and enclosed valleys filled with water. Then, as the sea level changed tens of thousands of years ago, this land was sometimes flooded and sometimes dry. These changes left very unusual geological traces behind.

Surveys of the caves in the area have also found traces of human activity spanning more than 30,000 years. Thirty thousand years. That reaches back to before farming began, to a time when people still lived by hunting and gathering. Prehistoric people lived in these caves and left behind their tools and the bones of animals.

More recent history is just as striking. Hoa Lư, which lies within the heritage area, was the capital of Vietnam in the 10th and 11th centuries. The Vũ Lâm Palace is tied to the Trần dynasty and its resistance against the Yuan Mongol armies. The Trần dynasty ruled Vietnam from 1225 to 1400. The palace was the base the Trần emperors used during the years of war. It is also linked to the moment when those emperors renounced worldly life to become monks. And it holds temples to the emperors and to Hưng Đạo Vương Trần Quốc Tuấn. Trần Quốc Tuấn was a military strategist who defeated two Mongol invasions.

The most popular way to experience Tràng An is by boat. There are several boat routes. Two well-known ones are Route 2 and Route 3.

Route 3 can be seen as the most basic guided route. It sets out from the Tràng An boat landing and first reaches the Trình Temple. Next come Đột Cave and Vân Cave. Then comes Suối Tiên Temple. The boat passes Địa Linh Mountain and Kim Quy Mountain. After that comes Đại Cave, and the route ends at the Vũ Lâm Palace before heading back to the landing. The whole trip takes about two and a half hours.

The first stop is the Trình Temple. It honors the officials known as the four pillars of the Đinh court, along with two supervising officials. It is an interesting stop, because it shows that nature at Tràng An has been bound up with people and history for a very long time.

Next comes Đột Cave, more than 1,000 meters long. Beyond it lies Vân Cave, also called Mây Cave, nearly 900 meters long. As the boat glides through these two caves, you see the cave ceiling and the rock walls mirrored in the water. Then comes the darkness inside the cave, and then light again beyond the far mouth. It is an experience that is very hard to put into words, and very easy to remember.

Suối Tiên Temple is the next stop. The temple is linked to Saint Quý Minh Đại Vương, and to a traditional festival held on the 18th day of the third lunar month.

Địa Linh Mountain is associated with sacred energy, and Kim Quy Mountain, also called Turtle Mountain, with permanence. In Vietnamese culture, the turtle is a symbol of long life and lasting strength. Đại Cave has one of the widest chambers in the Tràng An ecotourism area, and it is 150 meters long.

The route ends at the Vũ Lâm Palace. It has the densest cluster of historic buildings on the whole route. There is a temple to the Trần emperors and a temple to Hưng Đạo Vương Trần Quốc Tuấn. There is also the Thiên Phúc Pagoda. After a visit to the palace, the boat returns to the landing.

Route 2 also passes Suối Tiên Temple and the same two mountains. It reaches Đại Cave and the Vũ Lâm Palace as well. But it goes through a different set of caves. The boat passes Lấm Cave and Cao Sơn Temple. After them come Vạng Cave and Thánh Trượt Cave. Route 2 takes about two to two and a half hours, over about 10 kilometers of water.

Tràng An is not a place for passive sightseeing. Here you sit in a boat and pass through thousands of years of the country's history in just a few hours. The journey runs from prehistoric hunters sheltering in rock caves to Hoa Lư, the capital of the Đinh dynasty. Then comes the war base of the Trần dynasty, and finally today, when the world listed this place as heritage shared by all of humanity. The boat is rowed forward one meter at a time, and the story grows longer with every stroke of the oar.