The United Nations is gigantic bureaucracy in which different tribes fight each other for power and dollars, incidentally helping the world from time to time. But they have awesome headquarters in New York City's East River, designed by Le Corbusier and Oscar Niemeyer. Now it's available in Lego form.
$50 will get you this set of 597 Lego elements, which measures 8 (21cm) by 5 (14cm) by 6 inches (15cm) when built. [Lego Store]