LEGO Star Wars is popular.of course and LEGO does sell an official Super Star Destroyer set.
But that is a paltry thing compared to this beast of a model. The builder Jerac estimates that his LEGO Imperial Star Destroyer weighs around 110lbs, is over 6 and half feet in length and contains over 40,000 bricks. It is huge. And because of that it's also immensely detailed. In fact the build took Jerac about 6 months.
But the result is phenomenal. Make sure to click through and check out all the detail images.