This classic Tudor style estate is located at 3080 Ralston Avenue in Hillsborough, CA. Built in 1930, the gated estate is situated on 2.58 manicured acres. The main house and guest house offer approximately 15,200 square feet of living space combined as well as 11 bedrooms and 8 full and 3 half bathrooms. The main house boasts 6 bedrooms, grand formal reception rooms, plank hardwood floors, authentic leaded glass windows, gym, home theater and more. The guest house boasts an additional 3 bedrooms. The most unique feature of this estate is the resort style swimming pool with, get this, a 185 foot long waterslide (which is reported to be the longest residential one of its kind west of the Mississippi!!). The lavish grounds also feature a regulation size lighted tennis court with two viewing pavilions, full outdoor catering kitchen, pool cabana, manicured gardens and lawns and an outdoor barbecue kitchen. It is listed at $16,500,000.