Zak Bagans doesn't just collect haunted items for his museum -- he also goes the macabre route ... like adding the brothel bed connected to a death and an infamous overdose.
The "Ghost Adventures" star tells TMZ ... he's acquired the bed and bedroom furniture of Bunny Ranch and Love Ranch owner Dennis Hof, which eerily includes the mattress Hof died on. Which also happens to be the same mattress Lamar Odom was on when he overdosed 3 years prior, in October 2015.
Bagans says they never swapped out the mattress in the Love Ranch room, and now folks at the legal Nevada brother believe it's cursed ... and that's where Bagans steps in.
We're told the bed set is being donated to The Haunted Museum in Las Vegas, where, as we've reported ... Bagans displays spooky stuff like the "Devil's Rocking Chair" and a dybbuk box, along with creepy items like Ted Bundy's glasses.