Had a neighbour in Rosanna that turned his whole backyard into a model railway. It was massive and to scale.
Yup, G scale (Garden).. Plenty of them around.. Im into N Scale, 1:160
My current layout.. although this photo is from 2006, but now all the track is laid, and wiring nearly finished.. Trains will run around it completely...

Planning the scenery now. I Dream of it looking like Paul's layout above, but that bloke was "GOD" - everything hand built, locos, wagons, the mill that actually works - everything is FULLY functional for day/night running.