Healthcare entrepreneur Young Yi has proposed plans to build a 25,424 square foot mega mansion at 494 River Bend Road in Great Falls, VA. Modeled after Versailles and dubbed “Le Chateau de Lumiere”, the lavish home will boast five bedrooms, grand double staircase, gallery running the length of the home, three two-car garages, an elevator, swimming pool, pool house and more. The lower level alone will boast a wine cellar, gym, billiards room, home theater with concession stand, spa, sauna, card room, recreation room, gallery, kitchen and a guest bedroom. On the third floor, the master bedroom suite will take up an entire wing and consist of a study, sitting room, gallery and four other rooms. It is expected to cost $15 million to $20 million to build.