The Houses That Entrepreneurship Built

9 of 18

Mark Pincus, Co-Founder of Zynga

Location: San Francisco

Price: $16 million

From the gold rush to the game rush: The house was originally built by Henry Newhall, a California Gold Rush pioneer born in 1852.

Before buying this San Francisco mansion, Marc Pincus sold off two of his other (lesser) San Francisco homes--one for $1.9 million and another for $8.2 million, according to the Wall Street Journal. It was definitely a trade up.

(Continued on next page.)