An observation car is a carriage with wide windows for the view. Sit in the observation car.
It is put at the back or given a raised deck so nothing blocks the outlook. An observation car only makes sense on a route where the scenery is the reason to travel.
1nounobservation carA carriage with wide windows for the view.
“The observation car was full from the moment the mountains started.”
observation car is a carriage.
Practised in Railways