The Hải Vân Tunnel, the longest tunnel in Southeast Asia and Vietnam at 6.28 km (3.90 mi), lies on Highway 1 between the two cities of Da Nang and Huế in central Vietnam.
Hải Vân bridge leads to the Tunnel
The southern end of the Hải Vân Tunnel
The north end of the Hải Vân 1 Tunnel (right) and Hải Vân 2 Tunnel (left).
Da Nang or Danang is the fifth-largest city in Vietnam by municipal population. It lies on the coast of the East Sea of Vietnam at the mouth of the Hàn River, and is one of Vietnam's most important port cities. As one of the country's five direct-controlled municipalities, it falls under the administration of the central government.
Image: Bờ đông cầu Rồng
Image: Han River Bridge in Vietnam Night View
Image: Da Nang Marble Mountains 2020 IMG 4008
Early 19th-century sketching of An Hải citadel in Đà Nẵng during the Nguyễn dynasty