Jack Nicholson and Kirk Douglas probably had their own secret tunnels to the Playboy Mansion

It seems an editor was looking through the magazine's archives in preparation for a feature on Hugh Hefner's birthday when he came across a pile of Polaroids dated 1977. The photos, which are included in the Playboy.com post, seem to show some kind of underground excavation. When the editor asked the Mansion's general manager to explain the pictures, he served up this ghost story-ready reply: "That's probably when they built the tunnels in the '70s."

Ooh.

More