Those who visit Ninh Binh for its natural beauty would undoubtedly would profit from a trip to Thien Ha. The cave is the 200-metre-high Tuong Mountain, part of the mountain range that protected the old capital of Hoa Lu from invaders in the 10th century.
Even though the mouth of the cave is only about 4 metres across, the visitors who line up to go inside will not be disappointed with its size. The entire cave is around 900 metres deep, but only 700 of those metres are accessible by foot, as they are under water.
Still the 200 metres which are easily explorable offer a sense of tranquility and no shortage of natural stones which have been intricately carved by long centuries of water erosion.
If you would like to see the rest of the cave it is possible to take a boat, which will pass under many multi-coloured stalactites. There are even some underground islands, including Hoa Tien, Su Me and Ca Hoa Long islands.
