A friend once had a model railroad running around his entire yard. It was bigger than O and highly detailed but I cant remember what scale it was.. I'd ask him but unfortunatly he's gone to the roundhouse in the sky.. Does anyone know? I saw something called simular in the local hobby/crafts store Bachman I think it was. It looked larger than O Scale but not sure of how readily available the parts are they only had one kit with a Loco, Cars and a few feet of track.
Basically I'm looking for something to run around my yard too.