In Germany, there is a model railroad exhibit for modular model railroad layouts built in O gauge or O scale. As you know, O scale is exactly twice as large as HO scale. While this exhibit Pilentum made some video footage of beautiful model trains and landscapes. All layouts are made in Germany.
YouTube:
https://www.youtube.com/watch?v=4ndY0sEFb7g
O Scale 0 Scale O Gauge 0 Gauge O track 0 track track gauge train trains model model railway model train model railroad layout scenery Rail Transport Modelling (Collection Category) Railroad Railway