This is the one building I'd love to see more than anything on here...
The Basilica of the National Shrine of the Immaculate Conception in Washington, D.C, the mother church of the United States of America, and the largest church by volume in North America
Pictures:
http://jesusbewith.us/wp-gallery/national-shrine-immaculate-conception.jpg
http://www.lifesitenews.com/ldn/images/2007/US%20March%20for%20Life/Basilicaexterior.jpg
Information about the basilica, along with more photos:
http://en.wikipedia.org/wiki/Basilica_of_the_National_Shrine_of_the_Immaculate_Conception
http://www.nationalshrine.com/site/pp.asp?c=etITK6OTG&b=106948
that building looks pretty cool id help you but im just not good with mods