Mag claims that tunnels lead from Playboy Mansion to stars' homes, but is it just a prank?

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Secret Tunnels from Playboy Mansion to Jack Nicholson's House Uncovered

Is Playboy pranking us? Thanks to April Fools' Day, we're not sure what to believe, so you may need to take this story with a grain of salt. Then again, it could be true ... what do you think?

We have a pretty good idea of what went on at the legendary Playboy Mansion, but you may not believe what went on under it, INSIDE EDITION reports.

Playboy magazine reports it has just discovered blueprints for a network of tunnels beneath the mansion that supposedly led to the homes of Jack Nicholson, Warren Beatty, James Caan, and Kirk Douglas!

16 PHOTOS
Hugh Hefner through the years
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Mag claims that tunnels lead from Playboy Mansion to stars' homes, but is it just a prank?
Los Angeles, CA - OCTOBER 25: Hugh Hefner and Crystal Hefner attend Playboy Mansion's Annual Halloween Bash at The Playboy Mansion on October 25, 2014 in Los Angeles, California. (Photo by Charley Gallay/Getty Images for Playboy)
HOLMBY HILLS, CA - MAY 15: Playboy Founder and Editor in Chief Hugh M. Hefner (L) and 2014 Playmate Of The Year Kennedy Summers attend Playboy's 2014 Playmate Of The Year Announcement and Reception at The Playboy Mansion on May 15, 2014 in Holmby Hills, California. (Photo by Mike Windle/Getty Images for Playboy)
LOS ANGELES, CA - JANUARY 16: Cooper Hefner (L) and Hugh Hefner pose with Playmate Bunnies at Playboy's 60th Anniversary special event on January 16, 2014 in Los Angeles, California. (Photo by Charley Gallay/Getty Images for Playboy)
LOS ANGELES, CA - JANUARY 16: Hugh Hefner poses at Playboy's 60th Anniversary special event on January 16, 2014 in Los Angeles, California. (Photo by Charley Gallay/Getty Images for Playboy)
LOS ANGELES, CA - JANUARY 16: Hugh Hefner (C) poses with Playboy Bunnies, Playmate of the Year 2013 Raquel Pomplun (2nd L) and Miss December 2009 Crystal Hefner (2nd R) at Playboy's 60th Anniversary special event on January 16, 2014 in Los Angeles, California. (Photo by Rachel Murray/Getty Images for Playboy)
HOLLYWOOD, CA - JUNE 15: Publisher Hugh Hefner attends a press conference at the 35th Anniversary Playboy Jazz Festival - Day 1 at the Hollywood Bowl on June 15, 2013 in Hollywood, California. (Photo by Rodrigo Vaz/Getty Images)
BEVERLY HILLS, CA - MAY 09: (L-R) Cooper Hefner, Playboy Playmate of the Year Raquel Pomplun, Hugh Hefner and Jaclyn Swedberg attend the 2013 Playmate Of The Year announcement at The Playboy Mansion on May 9, 2013 in Beverly Hills, California. (Photo by Paul Archuleta/FilmMagic)
BEVERLY HILLS, CA - MAY 09: Playboy Founder Hugh Hefner (R) and his wife Playboy Playmate Crystal Hefner (L) attend the 2013 Playmate Of The Year announcement at The Playboy Mansion on May 9, 2013 in Beverly Hills, California. (Photo by Paul Archuleta/FilmMagic)
New York Friars Club Roasts Playboy founder Hugh Hefner at the New York Hilton Hotel in N ew York City. 9/29/2001. Pictured: Ice-T, Kylie Bax and Hugh Hefner. Photo: Evan Agostini/ImageDirect
BEVERLY HILLS, CA - SEPTEMBER 12: ***EXCLUSIVE*** (L to R) Publisher Hugh Hefner (C) poses with Playboy models Holy Madison (L) and Tiffany Holiday during Tiffany's birthday party at Koi restaurant September 12, 2002 in Beverly Hills, California. (Photo by David Klein/Getty Images)
Hugh Hefner and Gene Simmons at the Gene Simmons' 'Tongue Magazine' release party at Barfly in West Hollywood, Ca. Tuesday, June 11, 2002. Photo by Kevin Winter/ImageDirect. *** Exclusive*****
400796 01: Playboy founder Hugh Hefner (C) poses with his playmates outside Las Palmas club February 6, 2002 in West Hollywood, CA. (Photo by David Klein/Getty Images)
397548 05: Playboy founder Hugh Hefner poses with his Playmates at Joya club November 17, 2001 in Beverly Hills, CA. (Photo by David Klein/Getty Images)
BEVERLY HILLS, CA - SEPTEMBER 12: ***EXCLUSIVE*** Publisher Hugh Hefner poses with Playboy models Tiffany Holiday and Summer Altice during Tiffany Holiday's birthday party at Koi restaurant September 12, 2002 in Beverly Hills, California. (Photo by David Klein/Getty Images)
401246 11: Playboy founder Hugh Hefner (C) poses with his playmates during the 'Swank' show presented by Fetish Ball at El Rey Theater February 17, 2002 in Los Angeles, CA. (Photo by David Klein/Getty Images)
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Now, dig this, a photo from the late seventies allegedly shows an excavation in progress beneath the mansion!

And one shows the newly-discovered tunnel plans, check out the bunny logo on the plywood wall!

In the blueprint, it says the tunnels lead to James Caan's house, Nicholson's home, one to Douglas', while and another one goes all the way to Warren Beatty's house!

Former Playboy bunny Izabella St. James dated Playboy founder Hugh Hefner and wrote the book Bunny Tales: Behind Closed Doors at the Playboy Mansion.

She told INSIDE EDITION, "I think there may be some truth to it. I heard something about tunnels when I lived there one time. I always thought it was Playboy folklore, urban legend."

One Playboy source is saying the tunnels were closed up in 1989.

None of the four actors named has commented on the story. Back in the day, all four actors were known to frequently visit the Playboy mansion.

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