In Hamburg, Germany, housed in a nondescript brick building, you'll find the Miniatur Wunderlan d - the largest HO scale model railroad in the world. The model, which has taken more than 500,000 ...

While there are larger model railroad museums, Gribbell says he believes this is the biggest O scale model one. "There's some bigger ones in HO scale. There's a bigger one I know of in Ohio that's ...