A few months ago we had occasion to visit the mall while the Lego Americana Roadshow was in attendance for a few weeks. If you have not seen what Lego Master Creators can do, you have really missed something amazing. The Roadshow has 10 models, and the US Capital building is one of the most amazing. According to the accompanying sign, eight people worked for 1700 hours to make this astonishing model. As I recall, the structure is about 26 feet wide and about 10 feet high. The display base adds another 3 feet or so to that height figure.
Seriously, if you get the chance to see the Lego Americana Roadshow, be sure to take it. Keep an eye out for it to appear in your area.