Americans and the British model Sn3 as to re-create their narrow gauge past. America's western 3' gauge railroads, such as the Denver and Rio Grande, Southern Pacific Coast, Yosemite Valley and many others are generally modeled as Sn3 layouts. Quality, period locomotive and rolling stock, finished or as kits, structures and other layout compliments are available for Sn3. See the manufacturers links section. Track availability is sparse, be prepared to hand lay track. Period layouts generally depict rugged mountainous terrain. When structures are presented they are S scale.