Gardening is about plants and the things that accent the plants or possibly the other way around such as in a rock garden or sculpture garden.
I have been into garden railroading for many years and have set up courses in several of the gardens I have had at different residences. Weekend before last was the monthly meeting of the North Texas Garden Railroad Club where we got to sit around and discuss garden railroading.
Below is the course.
Beginning on the north end of the long stretch of track is the garden loop. A few boulders, a tree, and assorted green plants highlight this area surrounded by the courtyard wall.
To go to and from this area the train has to pass through a tunnel under a waterfall (not shown and not very big)
It continues down the tracks along some herbs and small flowering plants on one side of a walkway and continuing under the covered porch area that enters into the living room of the house.
Finally it passes the last pillar near the control area of the train to the train yard where cars can be taken on and off. The white rocks portraying more of a railyard than a garden. The width of the area being easily seen here is the reason for the long layout and gardening areas.