See Hanoi's Train Street from a Safe Viewpoint
In Hanoi, an active railway passes through a corridor so narrow that balconies, washing lines and café fronts seem to fold towards the track. When a train approaches, conversation gives way to metal, vibration and a brief sense of the whole street being rearranged around its passage. The railway is not a theme-park attraction. Tourist access has been restricted for safety, enforcement changes and published times are not a guarantee. Treat this as a future or conditional activity: use only a viewpoint that local authorities explicitly permit on the day, and accept that seeing the train elsewhere may be the responsible choice. Never walk, sit, pose or place equipment on the tracks, cross a barrier, rely on a café invitation as proof of lawful access or stand where a passing train leaves no protected clearance. Follow police and railway staff immediately, keep children beside you and do not distract residents whose homes border the line. Count this complete only after watching from a lawful protected public position. Add it if the meeting of railway and neighbourhood interests you, while keeping the story honest: the dramatic closeness is exactly why permission and distance matter.