[An Aerial view of Dong Hoi City in Quang Binh Province, Vietnam.] Dong Hoi is the capital of Quang Binh Province in north central Vietnam. It’s the gateway city to the Phong Nha-Kẻ Bàng National Park, where the world’s largest known cave can be found. Dong Hoi is on the coast with 12 kilometres of […]