There is an unusual 12-foot-wide, three-story standalone house in North Arlington that has been turning heads since construction began in 2007. Blog DC Metrocentric visited the now-finished home, which it calls the Super Model House -- tall and thin. The verdict? Thanks to big windows that let in lots of natural light, the house doesn't feel as cramped from the inside as might be expected. Plus, the finishes are top notch. The $1.25 million price tag is hefty in this market, though, especially for such a provocative design. Photos after the jump.