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Last Updated: Friday March 27 2009 13:40 GMT

Ricky checks out world's biggest mini-railway

Ricky at the model railway in Hamburg

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This might look like an ordinary train set, but it's part of what's thought to be the largest model railway in the world.

It's being built by twin brothers Frederick and Gerrit Braun in the German city of Hamburg.

Set over three floors and with about 10km of track, there's over 10 000 trains to spot and the whole world to see - from New York to the Swiss Alps.

Ricky went to Hamburg to check it out.