This 18,000+ square foot estate is located in Russia. It boasts a stone and brick home with living and dining rooms, kitchen, home office, terrace and more. The best part of this estate is the 13,500 square foot entertainment complex complete with indoor tennis court, large indoor swimming pool with tiled columns, indoor spa room, glass enclosed gym, billiards room with wet bar and more. The price is available upon request. The entertainment facility is quite nice and is a great feature, but I wish the main house itself was bigger and a  little more interesting. If you’re going to have a huge sports complex, you might as well have a huge main house as well!