Hải Vân Pass



The Hải Vân Pass (Vietnamese: Đèo Hải Vân) is a coastal mountain pass in central Vietnam. It is located on the border between Thừa Thiên Province and Đà Nẵng.

The pass has a winding road over the top, and North-South Railway to the east along the coast. There is a small village at the top.

A new road tunnel was recently built under the mountains to alleviate traffic from the sometimes dangerous top road, and making it less of a chokepoint to north-south travel within Vietnam. It is the longest tunnel in Southeast Asia.

The mountains that form the pass are an offshoot of the Annamite Mountains which extends all the way to the coast.