Dong Ha in Quang Tri province has a station on the North-South Railway, and there is also an old station that has been turned into a war memorial park.
www.railvietnam.com/old-dong-ha-...

The “Connecting Central Heritage” train is a special tourist train between Hue and Da Nang, operated by Vietnam Railways.
www.railvietnam.com/hue-da-nang-...

www.railvietnam.com is an independent guide to train travel in Vietnam, by James Clark from @nomadicnotes.bsky.social