Real estate has reached a new high (or low, depending on how you look at it) with this mansion in Corona del Mar. The "Portabello" (named for its mushroom shape) has gone on the market for $75 million, making it one of the three most expensive homes in America. The home features ocean views from most rooms, a two-story grotto with pool, 2 spas, bowling alley, theater, cafe, full exercise facility and a dungeon. You can read more HERE. We're just kidding about the dungeon.