Miniature Wonderland in Hamburg - absolutely amazing and in fact part of the layout is North American...
HO though! Be advised this is not a club, but a business, with something like a 100 person staff building
models, doing fairly sophisticated engineering and maintaining the thing.
It puts Northlandz to shame, actually, indeed it shows a better and more realistic view of US railroads than
Northlandz - with it's toothpick farms and physically impossible bridges can do.