1. Tam Coc - Bich Dong, Ninh Binh: This place is worthy of a flowery name like "Ha Long Bay on land" or Nam Thien De cave. Tam Coc is combined from 3 caves including Ca cave, Hai cave and Ba cave. All 3 caves are formed by Ngo Dong river flowing through the mountain. Walking on the Ngo Dong River, visitors will admire the magic of the cave and architecture from the temples in 3 caves. Photo: Samanthakayty, thisworldtravel .

2. Dau Go Cave, Ha Long Bay, Quang Ninh: In 1938, a French journalist introduced the beauty of Dau Go cave with the title "Cave of wonders" (roughly translated: "Cave of natural wonders However, formed 2 million years ago, the cave attracts visitors by its mysterious beauty and is as‌sociated with many myths. Dau Go Cave is divided into three main compartments, all of which are wild beauty with Photo: Draper.

3. Hang En, Quang Binh: This is one of the most famous and beautiful caves, located deep in the tropical forests of Phong Nha - Ke Bang National Park. At the same time, En Cave is the third largest cave in the world by volume (after Son Doong cave and Deer cave in Malaysia). It consists of 3 shops, the largest of which is up to 120 m high and 140 m wide. The dense mountains and forests surrounding the cave have created a pristine natural landscape and overwhelmed all visitors when coming here. Photo: Filip.

4. Son Doong Cave is one of the largest caves in the world in Son Trach commune, Bo Trach district, Quang Binh province. The cave was discovered in 1991 when Ho Khanh, a local resident, avoided rain. However, in 2009, when the Royal Cave as‌sociation of England came and discovered, Son Doong was officially recognized as the largest cave in the world. Son Doong cave has a length of up to 5 km and a volume of up to 38.5 million m3, enough to accommodate a 40-storey building in New York. Therefore, exploring Son Doong cave is always on the list of adventure tours that must go to anyone who is passionate about exploring. Photo: Oxaliadventure, gengxu.

5. Tu Lan cave system, Quang Binh: Located just 70 km from Phong Nha - Ke Bang National Park, Tu Lan cave system is hidden behind corn fields or rice fields. The majestic beauty of the place is one of the main scenes in the famous Hollywood movie Kong: Skull Island . In particular, visitors will have a unique experience when swimming under the mysterious underground river right in the heart of the wet caves of Tu Lan. This is the point that helps this system into the list of the most unique caves in Vietnam. Photo: Oxalis.

6. Thach Dong, Ha Tien and Kien Giang : Thach Dong is a vertical limestone block with a height of 90 m above sea level and a foot diameter of about 45 m. The cave has two main gates: one is facing Ha Tien town, the other is towards My Duc field. In the cave, there is a small niche leading up like a skylight and a niche leading to Mui Nai beach. Thanks to the legend of Thach Sanh legend saving the princess from the cave, the cave attracts many tourists to visit. Photo: Tuan Viet.

7. Phong Nha cave, Quang Binh: This is the first cave to be found and the name of Phong Nha - Ke Bang National Park is also derived from that. With a length of up to 7,729 m, this place is also the cave with the longest underground river in the world. Phong Nha cave consists of a large dry cave and is divided into 3 main sections, arranged according to the brightness level of these areas. Photo: Matthew.