Hang Tien Exploration
Hang Tien Cave Discovery
Members of the British Cave Research Association first examined the karst area around Cao Quang commune –Tuyen Hoa District, Quang Binh Province in 1992.
In 1994, the team returned for another cave exploration expedition that started with following a river winding into limestone mountains. To get there, they had to pass over the majestic Giang River and drop down into the Cao Quang Valley. Unfortunately, no cave entrance was found where the water comes out. Without giving up, they continued asking locals about the other caves around and were told about a small entrance nearby. After about half an hour of trekking, they had come to the Hang Tien cave entrance, 50m wide and 100m tall.
Hang Tien 1 was explored and surveyed for 2.5 kilometers, with an exit into the jungle leading to Hang Tien 2. After regular visits, Oxalis first started trial tours in the area in 2013 and officially operated caving tours into Hang Tien cave from 2017.
Geology of Hang Tien Cave
Hang Tien is the biggest dry cave in the Tu Lan Cave System and the enormity of this cave can be understood by the fact that Hang Tien 2 itself is almost 3km long and has a vertical range of about 100m.
During the summer, Hang Tien is a dry cave but when the rainy season arrives, all the water basins in the areas gather into this place, creating a large river flowing in the cave. When the water recedes, the beautiful natural jade lakes in the cave will be formed and also create fabulous karst formations that are incredibly unique. The infiltrating water flows from outside the limestone mountains dripping down to the cave, remaining there and creating extraordinary stalactites of terrace fields. Cave experts have examined and evaluated that these stalactites expand about 1 cm in 10 thousand years. This process has also created very impressive swirls on the cave’s domes.
On the other hand, the flora in Hang Tien cave is quite special. The rays of sunshine crept in the cave with the moisture, becoming the abundant source of life for mosses and mushrooms. They grow so rapidly that it covers almost the entire cave entrance, even clings to the long-established stalactites & stalagmites.