The most popular model railroading shops (based on online chatter) in Indiana, Kentucky, and Tennessee are:
10. Mishawaka runescape gold Rail Yard in Mishawaka, Indiana
A Tie for Number 8
8. BAD Hobbies in Nicholasville, Kentucky
8. Rupel Toy Trains in Elkhart, Indiana
7. Park Lane Hobbies in Dyer, Indiana
6. George's Train Shop in Huntington, Indiana
5. Aardvark's Model Train Shop in Nashville, Tennessee
4. Phil's Hobby Shop in Fort Wayne, Indiana
3. Berkshire Trains in Lexington, Kentucky
2. Scale Reproductions Hobby Shop in Louisville, Kentucky
...and the most popular shop for model trains in Indiana, Kentucky, or Tennessee is...
So, there are clearly many great model railroading shops all over Indiana, Kentucky, and Tennessee, with all three states having stores in the top five. Indiana had the most in the top ten with five, but Kentucky had four in the top ten - and also had all of the top three spots.
When in Indiana, Kentucky, and Tennessee be sure to visit some of the excellent railroading museums including Depot Railroad Museum in Salem,Indiana; Hoosier Valley Railroad Museum in North Judson, Indiana; Indiana Railway Museum in French Lick, Indiana; Indiana Transportation Museum in Noblesville, Indiana; Bluegrass Railroad Museum in Versailles, Kentucky; Nostalga Station in Versailles, Kentucky; Casey Jones Home and Railroad Museum in Jackson, Tennessee; Tennessee Central Railway Museum in Nashville, Tennessee; and Tennessee Valley Railroad Museum in Chattanooga.
I compiled this list by searching for the hobby shops listed on a number of search engines and ranking them by the number of web pages, discussion forums, photos, videos, etc that are available online. I further screened this list to include only pages that mentioned model railroading.
1. Johnny's Toys in Covington, Kentucky
Hobby shops not quite making my top 10 were G and G Hobbies in Griffith, Indiana; Joe's Hobby Barn in Terre Haute, Indiana; Linville Signs and Hobbies in Batesville, Indiana; Toys Forever Cheap Runescape Gold Models and Hobbies in Muncie, Indiana; Train Express in Indianapolis, Indiana; Watts Train Shop in Zionsville, Indiana; Wayne's Trains and Train Central in Indianapolis, Indiana; L and N Trains and Things in Louisville, Kentucky; The Roundhouse in Louisville, Kentucky; Chattanooga Depot in Chattanooga, Tennessee; and South Bound Trains in Franklin, Tennessee.