Tunnels to Celebrity Homes Below the Playboy Mansion?

One of our editors was in the office archives pulling photos for a feature set to run on Hugh Hefner’s birthday. He found some Polaroids from 1977 that showed a large excavation project at the Mansion. We asked the new general manager at the Mansion about these photos. He said, very matter-of-factly, “that’s probably when they built the tunnels in the 1970s.” Um, what?

Source: So, There Were Tunnels to Celebrity Homes Below the Playboy Mansion