A clown with a menacing grin. Bodies bound and dangling from the ceiling. A severed head in the freezer.
No, this isn't a nightmare or some suburban haunted house.
This is real -- or, at least, it was.
Welcome to "The Mind of a Serial Killer: The Experience," a bone-chilling immersive journey that dares New Yorkers to step into the twisted psychology of the world's darkest criminals, from inside shocking recreations of their crimes.
"[Serial Killers] raise the question people can't let go of -- how does someone become capable of this?" celebrity host LaKendra Tookes told The Post following a media preview of the grisly displays staged in Greenwich Village.
"It's not just the crime, it's the psychology," she said. "But what often gets lost is the reality behind it, and that's what we bring back into focus."
Still, to get through it, you'll need a strong stomach -- and a signed waiver. Attendees must formally acknowledge that exposure to the exhibit's "disturbing" themes may lead to "emotional distress."
Hot off a successful run in Europe, there's perhaps nowhere more fitting for the exhibit to make its US debut than the Empire State.
New York is home to 18 documented serial killers, the highest of any state in the country, according to a Newsweek analysis of national databases.
The immersive experience opened its doors to the public on Friday, April 17, greeting attendees with the steely, floor-to-ceiling glares of the world's most notorious predators.
And while many of these monsters have been behind bars -- or six feet under -- for years, a frighteningly recent mugshot hangs among them: New York's very own Gilgo Beach killer Rex Heuermann.
The Manorville architect pleaded guilty this month to murdering seven women and admitting to an eighth, finally bringing a gruesome end to the serial killings that haunted Long Island for decades.
Before facing the crime scenes, attendees get an inside look at how law enforcement tracked these predators down, peeling back the curtain on the police work that ended their reigns of terror.
That includes a crash course in criminal profiling, psychological evaluation and behavioral analysis.
"One of the biggest misconceptions is that they're all masterminds," Tookes explained. "In reality, many are identified through patterns, mistakes and persistence from investigators."
From there, it's a descent into the belly of the beast as attendees are invited to explore recreations of 20 infamous killing grounds.
The journey includes a model of Ted Bundy's 1968 yellow Volkswagen Bug, its headlights casting a ghoulish glow over a patch of soil dotted with placards for the women who fell victim to the "Lady Killer."
Nearby are the props the charismatic manipulator used to lure them in -- including the phony cast and crutch he used to play the victim.
Then, it gets truly grisly.
In a reconstruction of Jeffrey Dahmer's kitchen, attendees can peer into the Milwaukee Cannibal's freezer, packed with severed body parts, adjacent to a bloody heart resting in a skillet on the stove.
The experience continues through the home of a couple bound, tortured and killed by Dennis Rader (BTK), and into the cramped crawlspace where John Wayne Gacy stashed the bodies of 29 young men and boys.
You'll see the blood-stained bathtub of the "Vampire of Sacramento," Richard Chase, and the macabre workshop of Ed Gein -- the grave robber and killer who inspired horror flicks like "Psycho" and "The Silence of the Lambs."
The exhibit digs into deeper cuts, too, including snow-covered train tracks dotted with the victims of Soviet butcher Andrei Chikatilo and the torture chamber constructed by "Toybox Killer" David Parker Ray.
For those who haven't had enough, VR headsets allow guests to try their hand at solving crimes.
After two hours of slinking through the shadows, even a true crime aficionado's stomach would start to churn.
There is something striking -- and deeply sobering -- about being confronted with the reality of what was done to real people in these spaces up close.
It's a far cry from a Netflix documentary or a Ryan Murphy mini-series when you're standing in the recreated living room of a victim who lost their life because of a killer's twisted whims.
Tookes noted that the usual chatter of guests tends to die down as they move through the experience.
"You're not just observing a case; you're working through it, and that makes the story feel more real and more human," she said.
"Even true crime fans say it's far more complex than they expected, while those who don't usually follow it find themselves unexpectedly engaged."
In every room, the exhibit peels back the yellow tape, breaking down the psychological and social factors that led each killer to commit the unthinkable. It offers an unprecedented look into their depraved logic and the warning signs that were missed before blood was spilled.
It also turns the lens on the victims and their loved ones left in the wake of the carnage along with the impact that investigating these crimes has on law enforcement.
After seeing the toll up close, one could argue that the mind of anyone still "fangirling" over a Bundy or Richard Ramirez type belongs under its own microscope.
"This isn't about glorifying the killers -- it's about the psychology, the warning signs," Tookes said. "If you're curious, come with an open mind. You'll leave seeing these stories very differently."
"Mind of a Serial Killer: The Experience" is now open at 526 Sixth Ave. and will run through June. Tickets start at $27.90 for adults, with some discounted options available.
And, no, you can't bring your kids: this immersive journey is only for those aged 18 and up.