Head to the massive, sprawling Mall of America in Bloomington, Minnesota-the largest mall in the Western Hemisphere, they say- and you’re typically seeking some retail therapy in one of its 520 stores. Or maybe you’ve got your sights set on thrills with the SpongeBob SquarePants Rock Bottom Plunge roller coaster, one of several rides in the mall’s seven-acre Nickelodeon Universe indoor theme park. But now through the end of October, step through the second floor doors that once led to a well-loved Bloomingdale’s, and emerge in a steamy, marshy bayou in Slidell, Louisiana.

But wait, there’s more. In that bayou lurks a killer. His name? Onionhead. And though the moniker is objectively hilarious, the character is based on a very real, very sinister Louisiana folk story that features a troubled and disfigured young man exacting his revenge on those who wronged him. “He was brutally murdered by a vigilante mob after being falsely accused of the murder of a young woman,” explains Dylan DeFatta, part of the team behind American Monsters: Onionhead’s Revenge, the Mall of America’s first-ever onsite haunted house. “The town furiously hacked him up into 13 pieces, and scattered them in a nearby cemetery.”But Onionhead’s mother, a traditional Cajun traiteur, remained on her boy’s side. She put a hex on the townspeople who killed her son, then sewed him back together and brought him back to life using her healing powers. And here’s where the fun starts. “Every patron that walks through our doors is the next victim,” says DeFatta.

And what each “victim” experiences is the result of years of intricate planning from experts in the biz, devious-minded designers of haunts-a.k.a. hauntrepreneurs-who live and breathe spine-chilling scares. We spoke with two of these dictators of the disquieting, masters of the macabre, sultans of shriek (we could go on) to uncover the perfect recipe for a haunted attraction guaranteed to make you scream… or maybe even involuntarily release some bodily fluids. Be careful what you wish for.

Step one: Get your story in order

How do you take an esoteric piece of hyper-regional folklore and transform it into a series of universally terrifying jump-scare opportunities? DeFatta is a pretty good person to ask. Dubbed the “heir to the scare,” he’s the son of Greg DeFatta, proprietor of San Diego’s Haunted Hotel franchise and co-founder, along with experiential leaders Miziker Entertainment, of American Monsters. Birthed into a veritable factory of fright, the younger DeFatta went to school for woodworking before joining the family business. Several years later, he currently holds the vague but authoritative title, Haunt Director. “In school, [my] friends’ parents were teachers or worked for the government or Target,” he says. “It was kind of cool to be able to give out tickets to haunted houses-I’d figure out who was brave, and who were the chickens.”

All of this to say, if there’s anyone who knows how to make the hairs on the back of your neck stand on end, it’s this guy. When American Monsters first began conceptualizing Onionhead’s Revenge two years ago, they started with a storyline. “For us, it really helps with inspiration and theming,” DeFatta says. “It helps paint a clearer picture of the event you’re designing and keeps things cohesive and digestible.” Adopting a solid narrative is also key to staying fresh and attracting new customers year after year. Each of the company’s haunting concepts revolves around a different bit of folklore, blurring the unnerving lines between truth and fiction. Think Meow Wolf meets Deliverance.

Two years ago, Philadelphia’s Eastern State Penitentiary traded their single storyline theme for a more layered approach when they swapped their Terror Behind the Walls haunted house attraction for a broader, multifaceted festival. Initially spurred by the pandemic as a means to reduce bodily interactions between guests, social distancing aside, the event’s organizers had already been considering switching gears for some time, says ESP production designer James Travis III. Terror Behind the Walls played on society’s conceptions of “scary” prisoners and “wild” mental patients, a framework that seemed to work against the institution’s dedication to promoting social justice and prison reform. And while the same might be said about hosting a Halloween festival at all, the show also plays a vital role in allowing them to continue their important work. “We’re a nonprofit,” adds Travis. “Halloween Nights does pay for a large portion of our bills, and it’s our major fundraiser.”Stripping the seasonal installation of its single storyline means the team can explore multiple themes over five haunted houses. “We can look at each as a separate entity, we don’t need to try to force them into one storyline,” says Travis. “That really helps us make each haunted house better.” This year, there’s one dedicated to vampires, another to bringing nightmares to life (watch out for the dentist’s chair). And for the die-hards, there are plenty of easter eggs and underlying threads to parse while you comb the former prison’s storied halls. Says Travis, “It’s more of a web of deceit and lies that connects everything behind the scenes.”

Step two: Create a space that transports

Before he gets too far into Onionhead’s swampy backstory, I ask DeFatta if he considered simply leaning into mall culture as a theme. Capitalistic hedonism is pretty terrifying on its own, no? Not to mention, all those teenagers.

“Interesting,” he concedes, perhaps only to pacify me. “When we start the creative process, the first thing I want to do is put customers into a world they don’t find themselves in very often. I love when people walk into our space and completely forget that they’re in a mall. They feel like they’re outside in the bayou at night, and that’s how we set the stage for all the scares that follow.”

The effect is achieved in part by physically using the space to reinforce the carefully curated storyline. “Every scenic prop or set deck is specifically chosen to help enhance those elements,” he says. “Everything from the pre-show, when aerialists perform hanging from the ceiling,to the original soundtrack to the actors all help to tell that story as completely as possible.”Some haunted houses, however, don’t require a transformation to come across as believable. The massive, crumbling Eastern State Penitentiary already stands as an imposing, ghostly anomaly in the middle of bustling, lively Philadelphia. “It was designed to be scary, to say to the populace, ‘You don’t want to go behind these walls,'” says Travis, referencing the complex’s former life as a functioning urban jailhouse. “So we’ve got that going for us.”

But if you’re working with a historic property and legally can’t change anything, you may indeed have to employ a few tricks of the trade. That can mean anything from concocting the perfect peeling paint overlay to wrapping fake asbestos around pipes.

“Most of our haunted houses are freestanding buildings inside of buildings,” Travis adds. “A lot of the walls people see in the haunts, they think are historic, but our set decorators actually built them to look historic.”

Step three: Scare from all angles

Have you ever thought about what scares you? Is it spiders? Heights? Dying alone? Creatures on stilts inciting fear from above? This is the kind of stuff hauntrepreneurs sit around discussing every day, for fun.

“There’s a lot of things that go into making something scary, and there’s a lot of ways to do it,” says DeFatta. “Your classic scares are your jump scares, which are actually really effective and necessary.” This can look like deploying air blasters, small firecrackers, or quick bursts of energy coming from a prop or person. You can throw in some fog-literal smoke and mirrors-strobe lights, high production value AV, animatronics, phony creatures of the night, mannequins, and wow-factor set pieces like sledgehammers that swing from the ceiling or coffins that spring from the ground. And then there’s the reliable, simple scenario that both DeFatta and Travis are fond of: Dropping a guest into a room of clothed dummies where one is not like the others. “You know one of those has to be a person, you just don’t know when they’re going to come crawling at you,” says DeFatta. “And when it happens, you scream, you cry, or you pee yourself, and that is your classic haunted house.”

“I look at fear as being divided into dread, terror, and horror,” says Travis, explaining that a good haunted house can harness all three. “With dread, you know something bad is coming up, but it’s not there yet-it’s a slow build intensity. Terror is all out, like ‘Oh my God, this thing is about to fall and crush me, I’m gonna die!’ It’s that brutal rush.” And then there’s horror: “That’s like, they’re chopping a guy’s arm off and sewing on a robot arm, or they’re putting on somebody else’s face.”

Regardless of the particular tactic, haunted houses should be full-body experiences. “My favorite way to scare people is by removing or intensifying the senses,” says Defatta. “If you put somebody in a completely black room with an overwhelmingly disturbing and loud audio track, you remove their ability to communicate. It’ll be more difficult for them to guess what’s coming next.”

Include the olfactory for even more immersion. “If you have a butcher scene where someone’s been chopped up into a million pieces, playing the sound of flies starts to get your hairs on your neck really tingling, because innately, psychologically, and evolutionarily, we aren’t supposed to be in spaces like that,” says DeFatta. “We hear that and smell the meat and we think it’s time to run.”

Step four: Don’t be afraid to change it up

Both ESP and Onionhead’s Revenge offer add-ons for an even more intense experience. At the Penitentiary, optional glow-in-the-dark necklaces are free, and a sign that tells the actors that they’re allowed to touch you, take you into back rooms, and pull you out of the crowd for one-on-ones. At the Mall of America, $100 gets you the VIP Monster Pass, providing access to secret rooms and additional characters, and extending your time inside considerably. (Though, notes the website, there won’t be any refunds if you get too scared.)

But frights like these are not everyone’s cup of tea. When reimagining the Halloween experience at ESP, the team decided that scaredy cats also deserved to get in on the festive action. “A lot of people I know like Halloween-the fall atmosphere, pumpkins, pumpkin spice beers, ghosts, witches, stuff like that,” says Travis. “But they don’t want to have some actor jump out and scare them. That’s not their idea of a good time.” 

Therefore a ticket to the 11-acre property grants guests access to the entire grounds, letting them choose their own adventure. Don’t want to be chased through a dark tunnel by a chainsaw-wielding madman? Maybe you’d be more at home enjoying some campfire s’mores and scary storytelling, or catching ghostly flappers putting on a show outside Al Capone’s former cell. While you’re at it, you can take an audio tour detailing the prison’s history, narrated by none other than Steve Buscemi, or check out their award-winning exhibit covering the state of mass incarceration today.

“It’s more inclusive-if some people want to hang out and eat snacks and some want to do a haunted house, there’s plenty of flexibility,” says Travis. “This year, we bought new animatronics to fill out some of the spaces that were a little bit dead before, so you’re immersed the entire time.

At Onionhead’s Revenge, tickets aren’t required to enter the attraction’s bayou-themed lobby. There, you’ll find Vern’s Moonshine Bar, which serves up themed libations amid corrugated metal ceilings and taxidermied decor. And it’s great marketing-at first, you might not want to see what lies behind the large metal gates, but after a few cocktails, good old liquid courage kicks in.

Step five: Stay up to date on terrifying trends

“I can’t imagine what TransWorld would look like to somebody who’s not in the industry,” jokes DeFatta. Held every March in St. Louis, the horror trade show is a must for anyone in the haunting business. “There’s bodies hanging from every booth, there’s air cannons going off, and the place is filled with fog and lasers,” he explains. “You’ve got people running around with blood all over their bodies-it must be a sight to see if you’re just working the beer stand.”

But for hauntrepreneurs, a trip to TransWorld is crucial, not just to pick up the newest bloody stumps and gory makeup, but to keep up creatively. “It’s a place to meet with peers and talk about trends, how the industry is changing, how we’re going to adapt,” says DeFatta. Though what scares us is essentially embedded in our brains, it’s also subject to external factors, like when The Walking Dead brought zombies back to the forefront. “Zombies were all you could buy at the haunted house conventions,” says Travis. “This year, we started seeing a lot of mushroom-based things because of The Last of Us.”

Something that’s always a safe bet though? Clowns, says DeFatta. “They don’t exist in nature, and it isn’t necessarily built into our DNA to be afraid of clowns, but we are. We’ve had polls on our website about what scares you the most, and the number one thing is always clowns.”Want more Thrillist? Follow us on Instagram, TikTok, Twitter, Facebook, Pinterest, and YouTube.

Vanita Salisbury is Thrillist’s Senior Travel Writer. She might now know too much.