A natatorium nestles in the center of this $17.9 million home, once owned by Italian-born Cullen oil-heir Baron di Portanova. The 1968 house was expanded to more than double its size in the 1970s to enclose the backyard after the baron was unable to buy a famous Manhattan club for his wife as a birthday present. The 21,500 sq. ft. mansion has also reportedly hosted an extensive cast of characters, including a helicopter drop-in by James Bond (as played by Sir Roger Moore). The home contains 8 bedrooms, 9 full baths, and 3 half baths, and was listed on HAR in 2014 for 4 days; it was relisted in May of 2015 with a $1 million price drop.