Quite a few years ago I built this small 2'x4' N gauge layout mainly to test some scenery ideas.
It pre-dated my big O gauge 3-rail layout by a few years. This was my first use of pink Styrofoam insulation panels for scenery, a technique which later I used in several places on the 3 rail layout.
It was just two unconnected loops - an oval with a spur track on the bottom and a figure 8 on top.
Jim