A Silicon Valley estate once owned by Robert Noyce, who co-founded Intel in 1968, is for sale for $21.8 million. Noyce, who died in 1990, was known as the "Mayor of Silicon Valley" or "Father of Silicon Valley" and is known as one of the inventors of the microchip.

Take a look inside the home.

The four-bedroom main house has a formal dining room, a living room with a limestone fireplace, a library and a recreation room with a wine cellar and tasting room.