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Image 2 of 75 Williams' estate: 5 beds, 8 baths, 20,000 square feet Photos: The OpenHouse.com Williams' estate: 5 beds, 8 baths, 20,000 square feet Photos: The OpenHouse.com

Image 3 of 75 Living area of the Napa home. Photos: The OpenHouse.com Living area of the Napa home. Photos: The OpenHouse.com

Image 4 of 75 Formal dining room, Napa. Photos: The OpenHouse.com Formal dining room, Napa. Photos: The OpenHouse.com

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Image 6 of 75 Napa estate kitchen. Photos: The OpenHouse.com Napa estate kitchen. Photos: The OpenHouse.com

Image 7 of 75 1 of 5 elaborate bedrooms. Photos: The OpenHouse.com 1 of 5 elaborate bedrooms. Photos: The OpenHouse.com

Image 8 of 75 A 20,000 square foot home= long, long hallways. Photos: The OpenHouse.com A 20,000 square foot home= long, long hallways. Photos: The OpenHouse.com

Image 9 of 75 Another fancy bedroom. Photos: The OpenHouse.com Another fancy bedroom. Photos: The OpenHouse.com

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Image 11 of 75 1 of 8 baths. Photos: The OpenHouse.com 1 of 8 baths. Photos: The OpenHouse.com

Image 12 of 75 Game room in the 4rd biggest sale so far this year. Photos: The OpenHouse.com Game room in the 4rd biggest sale so far this year. Photos: The OpenHouse.com

Image 13 of 75 Of course, the Williams home needs a theater. Photos: The OpenHouse.com Of course, the Williams home needs a theater. Photos: The OpenHouse.com

Image 14 of 75 Rather stunning pool. Photos: The OpenHouse.com Rather stunning pool. Photos: The OpenHouse.com

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Image 16 of 75 For over $18M, it's fair to expect a private lake. Photos: The OpenHouse.com For over $18M, it's fair to expect a private lake. Photos: The OpenHouse.com

Image 17 of 75 And tennis court. Photos: The OpenHouse.com And tennis court. Photos: The OpenHouse.com

Image 18 of 75 And vineyard. Photos: The OpenHouse.com And vineyard. Photos: The OpenHouse.com

Image 19 of 75 Gorgeous Napa view. Photos: The OpenHouse.com Gorgeous Napa view. Photos: The OpenHouse.com

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Image 21 of 75 Property view. The home rests on 639 acres. Photos: The OpenHouse.com Property view. The home rests on 639 acres. Photos: The OpenHouse.com

Image 22 of 75 The 2nd most expensive sale this year so far is 190 Almendral, Atherton. It sold for $19,750,00 (after listing for $19,950,00 just 23 days previous to closing). Photos: The OpenHouse.com The 2nd most expensive sale this year so far is 190 Almendral, Atherton. It sold for $19,750,00 (after listing for $19,950,00 just 23 days previous to closing). Photos: The OpenHouse.com

Image 23 of 75 Inside, of the 2nd biggest sale are 6 beds and 9 baths, 13,350 square feet. Photos: The OpenHouse.com Inside, of the 2nd biggest sale are 6 beds and 9 baths, 13,350 square feet. Photos: The OpenHouse.com

Image 24 of 75 Living room in 2nd priciest home. Photos: The OpenHouse.com Living room in 2nd priciest home. Photos: The OpenHouse.com

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Image 26 of 75 More living room action. Photos: The OpenHouse.com More living room action. Photos: The OpenHouse.com

Image 27 of 75 And more living room! Photos: The OpenHouse.com And more living room! Photos: The OpenHouse.com

Image 28 of 75 Kitchen in 2nd biggest sale. Photos: The OpenHouse.com Kitchen in 2nd biggest sale. Photos: The OpenHouse.com

Image 29 of 75 Another kitchen view. Photos: The OpenHouse.com Another kitchen view. Photos: The OpenHouse.com

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Image 31 of 75 Kitchen island. Photos: The OpenHouse.com Kitchen island. Photos: The OpenHouse.com

Image 32 of 75 Dining room opens onto outdoors. Photos: The OpenHouse.com Dining room opens onto outdoors. Photos: The OpenHouse.com

Image 33 of 75 Top-most bedroom. Photos: The OpenHouse.com Top-most bedroom. Photos: The OpenHouse.com

Image 34 of 75 Stairwell/landing. Photos: The OpenHouse.com Stairwell/landing. Photos: The OpenHouse.com

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Image 36 of 75 One of many bed options in Atherton. Photos: The OpenHouse.com One of many bed options in Atherton. Photos: The OpenHouse.com

Image 37 of 75 The home is brand new, built in 2015. Photos: The OpenHouse.com The home is brand new, built in 2015. Photos: The OpenHouse.com

Image 38 of 75 Laundry area= organization ability. Photos: The OpenHouse.com Laundry area= organization ability. Photos: The OpenHouse.com

Image 39 of 75 Library/office. Photos: The OpenHouse.com Library/office. Photos: The OpenHouse.com

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Image 41 of 75 Game room Photos: The OpenHouse.com Game room Photos: The OpenHouse.com

Image 42 of 75 Fancy bath. Photos: The OpenHouse.com Fancy bath. Photos: The OpenHouse.com

Image 43 of 75 A home theater, of course! A home theater, of course!

Image 44 of 75 The back view and pool of 2nd Atherton home. Photos: The OpenHouse.com The back view and pool of 2nd Atherton home. Photos: The OpenHouse.com

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Image 46 of 75 Wider view. Photos: The OpenHouse.com Wider view. Photos: The OpenHouse.com

Image 47 of 75 Cabana. Photos: The OpenHouse.com Cabana. Photos: The OpenHouse.com

Image 48 of 75 Cabana, nice enough to call home itself. Photos: The OpenHouse.com Cabana, nice enough to call home itself. Photos: The OpenHouse.com

Image 49 of 75 Cabana bed. Photos: The OpenHouse.com Cabana bed. Photos: The OpenHouse.com

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Image 51 of 75 Cabana sitting room Photos: The OpenHouse.com Cabana sitting room Photos: The OpenHouse.com

Image 52 of 75 The most expensive sale this year was 6889 Devon Way, in the Oakland Hills. It sold for $20,050,000 (and listed for $21,000,000 in 2014). Photos: The OpenHouse.com The most expensive sale this year was 6889 Devon Way, in the Oakland Hills. It sold for $20,050,000 (and listed for $21,000,000 in 2014). Photos: The OpenHouse.com

Image 53 of 75 The #1 most expensive home is sited near the top of the ridge on a 20+ acre parcel high atop the Oakland / Berkeley hills. Photos: The OpenHouse.com The #1 most expensive home is sited near the top of the ridge on a 20+ acre parcel high atop the Oakland / Berkeley hills. Photos: The OpenHouse.com

Image 54 of 75 Aerial view by day. This is a 4 bed, 7 bath, 14,000 square foot abode. Photos: The OpenHouse.com Aerial view by day. This is a 4 bed, 7 bath, 14,000 square foot abode. Photos: The OpenHouse.com

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Image 56 of 75 Outdoor landscaping detail. Photos: The OpenHouse.com Outdoor landscaping detail. Photos: The OpenHouse.com

Image 57 of 75 View of deck and patio and overlook. Photos: The OpenHouse.com View of deck and patio and overlook. Photos: The OpenHouse.com

Image 58 of 75 Frank Lloyd Wright touches abound. Photos: The OpenHouse.com Frank Lloyd Wright touches abound. Photos: The OpenHouse.com

Image 59 of 75 Kitchen in biggest sale. Photos: The OpenHouse.com Kitchen in biggest sale. Photos: The OpenHouse.com

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Image 61 of 75 View/layout inside. Photos: The OpenHouse.com View/layout inside. Photos: The OpenHouse.com

Image 62 of 75 Living room is a serious showcase. Photos: The OpenHouse.com Living room is a serious showcase. Photos: The OpenHouse.com

Image 63 of 75 Same thing, but at night. Photos: The OpenHouse.com Same thing, but at night. Photos: The OpenHouse.com

Image 64 of 75 Sunset takes over the whole room. Photos: The OpenHouse.com Sunset takes over the whole room. Photos: The OpenHouse.com

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Image 66 of 75 Lots of intriguing interior features. Photos: The OpenHouse.com Lots of intriguing interior features. Photos: The OpenHouse.com

Image 67 of 75 Tiny bit Star Trek as well. Photos: The OpenHouse.com Tiny bit Star Trek as well. Photos: The OpenHouse.com

Image 68 of 75 Wine cellar, but of course. Photos: The OpenHouse.com Wine cellar, but of course. Photos: The OpenHouse.com

Image 69 of 75 Garage, luxe car. Check and check. Photos: The OpenHouse.com Garage, luxe car. Check and check. Photos: The OpenHouse.com

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Image 71 of 75 Pool outside, sparkling in the sun. Photos: The OpenHouse.com Pool outside, sparkling in the sun. Photos: The OpenHouse.com

Image 72 of 75 Your own vineyard. Photos: The OpenHouse.com Your own vineyard. Photos: The OpenHouse.com

Image 73 of 75 The view from this year's #1 sale so far: stellar. Photos: The OpenHouse.com The view from this year's #1 sale so far: stellar. Photos: The OpenHouse.com

Image 74 of 75 See the whole bay, and more. Photos: The OpenHouse.com See the whole bay, and more. Photos: The OpenHouse.com