Quang Binh is a province in Vietnam, located in the central part of the country. It is known for its beautiful natural landscapes, including caves, beaches, and forests. Some of the most popular tourist destinations in Quang Binh include Phong Nha-Ke Bang National Park, the Son Doong Cave (the world's largest cave), and the Dong Hoi Beach. The province has an area of 8,065.8 square kilometers and population of 1,003,430 inhabitants (as of 2021)

The Citadel (Thanh co Dong Hoi) in Dong Hoi, Quang Binh province, Vietnam, is a historic fortress that played a significant role in the country's history. The Citadel was built during the Nguyen dynasty in the 19th century and served as a military stronghold to defend the kingdom from invaders.

The Dinh Bac Citadel (Định Bắc Trường Thành or Luỹ Thày) is a historic site located in the Quang Binh province of Vietnam. The citadel was built during the Nguyen Dynasty, and served as a military fortification to protect the region from invaders.

Phong Nha-Ke Bang National Park (Vuon quoc gia Phong Nha-Ke Bang) is a UNESCO World Heritage Site located in Quang Binh Province, Vietnam. The park covers an area of over 850 square kilometers and is home to avast network of caves, including the world's largest cave, Hang Son Doong.