This is a great work of a Brazilian guy found on Procedural forum.

It´s an interactive model of a Factory, where you can see all the factory´s buildings, walk around, and more!

Click the picture below to see a screen shot: 

If you need python24.dll, download it here: http://www.blendermasters.com/cms/component/option,com_docman/task,doc_download/gid,21/Itemid,32/