Golf's most valuable piece of land is unintentionally unknown to most golfers. Turn onto 91st Street in Surfside, Fla., north of Miami Beach, and you'll encounter a highly ornamented, police-gated bridge that looks like an entrance into a country club. In a way, it is. Indian Creek Village has become an enclave for society's richest individuals. Mark Zuckerberg and his wife just closed on a $170 million, 1.8-acre mansion.