When I saw this replica of Ludwig Mies van der Rohe's Farnsworth House, I thought it was fantastic! Even down to the interior and furnishings. I can't wait to visit more builds like this! SL makes it accessible for all of us to visit architecture icons like this. Located on Architecture Island at The Homestead, which is a central point for many RL architects, you'll find displays about architecture and some interesting builds.
Here is a link to info about the original.