Waters & West Point Railroad Museum
The Waters and West Point Railroad Museum is based on the abandoned route between West Point, Mississippi, and Waters, Mississippi, in the suburbs of Columbus, Mississippi. I tried to make the route the track as close to the prototype, but I decided to remove a small section between the station in Waters and the rest of the route because it passes thru suburbs of Columbus, since I'm trying to create a more 'scenic' route. A 10-stall roundhouse, restoration shops, locomotive servicing facilities (i.e. coal shed, water tower, sand, diesel fuel pump, etc.) and a turntable large enough to turn a large 2-8-2 are located within the wye at Waters. The 4-track yard makes up one leg of the wye, another leg of the track connects to the interchange with a double-track mainline. The third leg of the wye goes behind the roundhouse and then comes up next to the yard and then connects to that leg of the wye. At West Point, there is a reverse loop to turn the complete train around (I hate seeing a observation car being the first passenger car after the locomotive). The radius is 125 meters for the reverse loop, which is pretty sharp; however, if you measure the 
diameter of the curved leg of the wye at Grand Junction at the Tennessee Valley Railroad Museum, it comes to about 165 meters. At about the halfway point, there's a passing siding called 'Vail', where shorter excursions, powered by diesels travel to. The diesel runs around the train and pulls the train back to Waters. Between Waters and Vail, the railroad travels across several bodies of water, including two bridges over a lake, which the tracks travels across one bridge onto a island in the lake, then another bridge to get across the rest of the lake. The town of Waters is represented as a small town, 
not a suburb of a Columbus, though a 4-lane highway passes thru the center of downtown Waters. West Point is also represented as a small town. Rolling stock included a variety of freight cars, plus coaches, a diner, and an observation car. A tool car and auxiliary tender rounds out the rolling stock. The steam locomotives are a 4-6-0, 2-8-0. 4-6-2, 2-8-2. Diesels are an EMD E8, two GP9's, an ALCO RS-3, and a F7 A-A set.
Here's a satellite view of the actual roundhouse and surrounding area:
https://www.google.com/maps/@33.5006685,-88.4124571,301m/data=!3m1!1e3