DK Publishers recently released a boxed set: The LEGO Book, all about the hobby and another about minifigs (celebrating their 30th anniversary). One of the coolest aspects of the book is the inclusion of creations by LEGO fans, including the previously blogged recreation of the Cologne Cathedral by Jürgen Bramigk.
I apologize for the quality of the photo. This was cropped from a snapshot I took with my phone. Follow the link I gave above to a full gallery of great photos of this cathedral.