German LEGO power-builder Thomas Grassman sounds like one heck of a GeekDad. He, and his son Sebastian, have assembled a ginormous, and incredibly impressive Explorien Colony Ship, a massive-scale spaceship with a completely self-contained colony meant for another world. They have included amzing levels of detail, including special landing ships and fully-realized interior spaces. You can check out many more images of the ship, plus tons of other builds by Thomas, here (all in German).
Via Brothers Brick.