A Lake Tahoe mansion that once belonged to early gambling innovator William F. Harrah is now on the market for $25.75 million. This 20,000-square-foot waterside home has eight ensuite bedrooms, thirteen bathrooms and a bunk room for twelve. The three-level structure also features multiple entertainment amenities, including a home theater, billiards, wet bar, pool, private beach and pier. This mansion also has its own spa, complete with salt cave, steam room, sauna, jetted bath, cold plunge, and hair and nail salon. Harrah built a secret tunnel throughout his home to allow high-provide guests to enter privately, though it has since been sealed. Credit: Top Ten Real Estate Deals