. . . a cornfield.
Glad you cleared that up for us.
Well, now I can sleep at night, knowing that the scariest thing in the world is likely not located anywhere near where I live. 
I’ve always thought the scariest thing was the door to the cellar.
In fact, Arizona planted 50,000 acres (2/3 of the way down) of corn last year.
Be afraid.
I think a tube station must come close. And a tube station full of corn, well that’s just crazy talk.
Clown dolls are scarier than either.
For an American in a semi-rural area, a confused moment of thought briefly brought to mind images of some kind of “Clonus Horror” lab filled with canted critters, before I realized you meant what we’d call a “subway station.” Which does make more sense, and is certainly scary, but I think I like mine better. 
Yeti’s eating corn… And there’s a link to trains too, the burning train from War of the Worlds or the train full of the blind in Day of the Triffids (no, neither is a spoiler)
Then your dead Dad walks out of the corn and you find out he was lying to you all this time. He wasn’t a ball player, he sold hotdogs in the stands, dressed as a clown. Awwww Dad??!!?!
I thought it was either spiders or rats. But then those were both based on books, so maybe they don’t count.
Stairs.
I’m not going to be scared with the knowledge that I could defeat this with nothing but a smouldering cigarette butt.
What about beaming down while wearing a red shirt?
Parking garages. It never fails; when a movie character shows up in a parking garage, you automatically know something alarming is going to happen.
LMAO!
Yes, I’d say that’s the winner.
Creepy little girls. Dead, undead, possesed; it’s all bad.
A ringing phone.
Ventriloquist’s dummies, for sure.
They seem to think tarantulas are scary too, for some reason. That wuss James Bond went postal over one in “Dr. No.”
A cat jumping out of the shadows.
Cornfields are great. Cornfields are tired of this bad press. Why at cornfields you are likely to meet friendly and uber helpful Scarecrows or even late great baseball players. What more do you want from life. Please stop besmirching Cornfields. We are not scary, we are just misunderstood.
Signed,
United Cornfield Anti-Defamation (UCAD)