A new report from Playboy Magazine claims old blueprints link the Playboy Mansion to several neighboring celebrity homes via a series of secret tunnels.

Magazine staffers claim they discovered excavation photos taken in the 1970's and eventually found tunnel blueprints stored in the Mansion basement purporting to lead the (now-former) homes of actors like "Mr. J. Nicholson," "Mr. W. Beatty," "Mr. K. Douglas" and "Mr. J. Caan."

We asked if we could see the tunnels. A staff member said, off the record, "I heard they were closed up sometime in 1989." Hugh Hefner married Playmate Kimberley Conrad in 1989. We went back to the general manager, and he said he couldn't discuss it further. We then asked The Mansion staff for more info about the celebrity tunnels, and we were told Mr. Hefner did not wish to comment. We reached out to reps for Nicholson, Caan, Douglas and Beatty, and they have not agreed to comment.

It's unclear if the tunnels were ever actually constructed, though polaroids on the Playboy website suggest at least some excavation work was done.

Blueprints suggest secret tunnels connected the Playboy Mansion to homes of nearby celebrities http://t.co/AaRphe9ghj pic.twitter.com/HTZXRdeTi3 — Geoff Manaugh (@bldgblog) March 30, 2015

[image via AP]