This gated mega estate is located on N Michigan Road in Indianapolis, Indiana and is owned by Christel Dehaan. Christel married Jon DeHaan, founder of Resort Condominiums International. They divorced in 1987 and the court awarded her half of the company. She bought the remainder from her ex-husband 2 years later for $67.5 million; expanded it, sold to HFS (now Cendant) in 1996 for $825 million. She was worth an estimated $750 million back in 2003. She started the Christel House charity and plans to donate the estate to them when she dies. The estate boasts a long driveway, 25,000+ square foot main house, swimming pool, tennis court, detached garage, power plant and a massive man-made lake.